What will it take to get a TIH sequel?

Wow... only one thread in this forum... anyway... this is pretty much a Box Office thread obviously... but it depends on a lot of other factors too so I wanted to point those out. I just don't see where TIH is getting a sequel... the first Hulk made about a good 250... and that was the first Hulk movie back when comic book films were pretty much establishing themselves... certainly I think TIH can duplicate that at least but even then... would 250 be enough? I think the Ang Lee version left a bad taste in people's mouths... and while this film will probably be better... the fact that we have already seen the modern Hulk might be a turnoff for some people... plus I think Norton would command a good 15-20 million to do another one regardless of what the B.O total is... I say just ditch the sequel and lock up Norton/Hulk for the Avengers movie... otherwise if they wait Norton will probably leave the character BEFORE an Avengers movie... or his role will be severely relegated to a cameo or a short "Cyclops" type role like X-3.