I think everyone's forgetting one thing here.
Digital downloads, and DVD's, forget about merchandise and tie-ins, there seperate, when it comes to really making money these two are it.
Why have family guy and Futurama come back after being cancelled, because of the success of the DVD sales showing there's an audience, because of this studio's are now thinking differentley about TV show's eventually things like sweeps won't matter because alot of shows will be made for DVD why have advertisers paying you, only by twisting your arm on what to show like cliffhangers and full on expensive action episodes when you can just give the audience the show they wanna watch and they can watch it when they want.
Same for Movies, this will be huge on DVD, Blu-Ray and HD DVD plus whatever digital downloads will be going on, maybe through I-Tunes once the new I-Pod comes out, so whatever it's doing now will be increased, giving more than enough for the sequel.