It wouldn't be a bomb (let's be honest here, if it makes $600-700 million that isn't really bad) but it would show the beginning of the downfall of Sony's Spider-Man franchise (in terms of B.O. revenue). Also considering that Sony spent over $400 million on this film, they would need it to make more money.
I think it shows to me the audience maturity with these films. Being "better than Spider-man 3" isn't enough. Again I hate to give a funeral to the film before I've even seen it, but with these tepid international numbers, it's hard to believe what I'm seeing. Maybe the domestic response will be very good, but it's not going to get help from positive reviews.
I think MoS benefitted over Superman Returns, because while not terrible, Returns was just really boring. I wasn't a fan of MoS, but it is watchable and enjoyable, can't really say the same for Returns.
Spidey 3 wasn't terrible. It wasn't great, but it was watchable and there were some moments that were dare I say brilliant (like Sandman forming for the first time, really one of the most touching and terrifying moments in Superhero films). On the other hand you've got some of the worst stuff going on here, like Emo Peter, the disco dancing, and Kirsten Dunst who was just flat out annoying in this film.
On paper TASM2 would seem to have everything going for it, but again it seems like another case of too much going on. I have a feeling I'll like electro better than anything in this film. I don't think I'll like the goblin interpretation.
What's sad is I really like Garfield as Peter Parker.