In the past, Film-techers have correctly predicted several blockbuster matchups (Shrek vs. Atlantis; 102 Dalmatians vs. The Grinch; and a couple of others I can't remember) and with Spidey's big opening weekend, the question must be asked:
Can STAR WARS 2 top this opening?
And which will be the bigger grosser overall?
Let the predictions begin!
I predict that Spidey will keep the opening weekend record, but Episode II will stand taller at the end of the game.
MOst, myself included, will wait on EP 2.
Dave
I am not too certain about the following, but I think that Spidey will gross a bit more in the end, but it will be close. Those are my predictions.
I'm going to wait and see how much screen time Jar Jar has in Episode II before making my prediction on which movie will do more money in the end. If he has less than 10 minutes worth of screen time, Episode II will definitely make more overall. More than 10 minutes? Hmmmmm, it depends on how much he keeps his mouth shut and how many things he has to trip over.

Joe B: Episode 2 has a 4-day opening weekend -- in Canada.
Mr. Binks has less than 10 minutes total screen time and virtually nothing that comes from his computer-generated mouth this time around is for 'comic' purposes.
It is NOT Jar-Jar that provides the 'comic relief' in Ep. II.
-Aaron
My reasoning:
I was a little disappointed with Spiderman. Some great action, a story that was true to the comic, but I found that there was just too much focus on the romance for my taste. I love Sam Raimi's style, but I'm not sure I understand why he choose to emphasis that aspect as much as he did. He's an comic book action hero...and for that reason, I don't think Spiderman will get as much return business. I know I will see it one more time (I need to take the wife with me this time), but that will most likely be it until it comes out on DVD. I enjoyed it, but not enough to fork out $13.50 again, and I suspect that many other fans felt this way too.
If the online reviews I've read about AOTC is correct, then Star Wars fans are going to really enjoy this one. That means a lot of return business, but I think that many will hold off until word gets around that it isn't just a 2 and a half hour kid's movie. It will have a slower opening week, but stronger life.
Or I could be completely wrong!
(My opinion here)
Hoyts mase a big deal how tickets were on sale 9.00am Thursday.
One sad, lonely, pathetic loser spent the night camped out in front of the doors only to be beaten to buy the first tickets by someone who came in off the street and the opposite door was opened first.
I will be running Spiderman when it opens in New Zealand.
I can wait a while for Star Wars.
No 'new' creature, just an 'old droid'...
It's C3PO that provides the bulk of the 'laughs' in this one.
-Aaron
What's more telling is that the Episode 2 soundtrack sold fewer copies last week than The Scorpion King or O Brother, Where Art Thou?
I smell another expensive embarrassment in the making.
Spiderman (5/3):
$39,406,872 gross/3,615 theaters/$10,901 per-theater average
Star Wars Episode 2 (5/16):
$30,141,417 gross/3,161 theaters/$9,535 per-theater average
The winner and still champion: Spider-Man!
Also, the Spider-Man soundtrack is No. 6 on the national album sales chart -- and the Star Wars Episode 2 soundtrack is No. 46.
-Adam
Most daily papers in New Jersey didn't do any stories about the midnight shows. That's because a much more significant story was coming in . . . Bush knew about 9/11 in advance and did nothing!
Is it not true that, because of the running times, plexes that booked multiple prints could get in additional shows of Spider-Man, hence more seats available for the first day?
Also, the Thursday gross for Star Wars includes all those midnight shows, so wouldn't that tend to inflate the Thursday numbers somewhat?
I have always believed that what is most important is the final numbers. We all get caught up in the opening weekend hype, comparisons, and averages, and most of the money goes to the distribs anyway.
The bottom line is really what the film does for you at your location.
So... Star Wars or Spider-man can win this race and... if doesn't matter who I'm rooting for. I'm still worth just as much or as little as I was before anyone paid to see either of those movies.
Bill
Spider-Man (5/3-5):
$114,844,116 from 3,615 theaters ($31,769 per-theater average)
Star Wars Episode 2 (5/17-19):
$80,027,814 from 3,161 theaters ($25,317 per-theater average)
Now let's compare the top New York engagement for opening weekend . . .
Spider-Man: $314,534 on 6 screens of the Loews E-Walk
Star Wars Episode 2: $259,361 on 6 screens of the AMC Empire
(5 film prints plus 1 DLP)
The winner and still champion: Spider-Man!
114844116 (SM weekend) / 80027814 (SW weekend) = 1.435 ratio.
198 hits (SM Friday) / 133 hits (SW Friday) = 1.489 ratio.
Very close!
It proves that I can judge the popularity of a big movie by how many hits I get on my site on Friday of opening weekend!
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Evans A Criswell
Huntsville-Decatur Movie Theatre Information Site
You think if Spiderman opened the 16th and Star wars opened the 3rd Spiderman would have had the same numbers?
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Greg Mueller
Amateur Astronomer, Machinist, Filmnut http://www.muellersatomics.com/
And star wars has not opened in many countries so it's not a world worldwide.
74 other countries.... that's pretty world wide I'd say
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Greg Mueller
Amateur Astronomer, Machinist, Filmnut
http://www.muellersatomics.com/
First week (7 days) of Star Wars Episode 2: $134,869,203.
The winner and still champion: Spider-Man!
Not only that, Spider-Man is in 3,876 theaters in US/Canada this Memorial Day weekend -- another new record! 
FWIW all numbers quoted are US/Canada totals via Box Office Mojo.
A month ago I'd have never thought such a headline was possible, but now it's looking more and more like Spidey will win out.
I love it!
Suppose this Spider-man franchise continues to be a huge success for years to come. I guarantee that no matter how bad you think the fifth Star Wars movie is, if they ever make a fifth Spider-man movie it will be absolute rubbish. (If this actually happens, I'm willing to return to this same thread many years from now to say "I told you so.")
So... you don't like Star Wars. Big deal. You don't need Spider-man to prove your point.
I just think it's hilarious that a film like Spider-Man can come out of left field and knock the hell out of a Star Wars movie when everyone in the whole industry would've bet their Beemers it would never happen.
I also have to admit to being somewhat resentful of the whole Star Wars thing for one big reason: We can't play the damn movie yet. I own a single screen in a small town, and because we fall under Fox's "Low grossing" policy, we have not been informed yet when we will get to play Star Wars II. It could be July...might not be until August. We just don't know and they will not say yet. We're probably looking at waiting until at least 8 or 10 weeks after the break. Meanwhile our audience is getting frustrated and impatient, possibly losing interest in seeing it, or deciding to wait for the video.
In contrast, we already played Spider-Man, not on the break but only 3 weeks in, and did very well with it. We play most movies either on the break or within the first 4 weeks...but not Fox movies.
If the Star Wars series were released by any other studio, we'd probably be playing EPII right now instead of having to guess when we might get it. Very frustrating for me AND my customers.
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Adam Fraser
www.pinestheatre.com
I just start the movie when it is time, and that's it. If there is a problem with a presentation, I want to know what auditorium. I am not interested in the title of the movie. Titles are meaningless to me while I am running a booth. I go by numbers and my time table, not the name of the movie. 
As they say in the navy, "Don't sweat the petty shit." 