At all my local stores, the P.O.P. Legos are shelf warmers, I think if the Minifigures were sold alone then the sales would have done much better, Toy Story is good for kids who are just being introduced to the series with Toy Story 3 but also some of us adults who remember when the first movie came out....with that being said, I think that there is room for three different types of markets....what's popular with kids and what's popular with adults and what's popular with both....
Since Disney just bought Marvel Comics and Lego has now put out Prince Of Persia, Cars and Toy Story all of which are Disney properties then who knows what we'll be seeing as far as what the future holds for Lego and Disney....
Spiderman (again but with the comicbook costume and or the new Marc Webb directed Spiderman Reboot)
Iron Man
Captain America (movie coming out in the next year or so)
Thor (movie coming out soon)
The Avengers (movie coming out in the next couple of years)
X-Men....
You all get the point....
Those (to me at least) are properties that would make a ton of sense to go after, just look at how much Batman and Spiderman go for on online auction!
And hey, get DC Comics on board with more than just Batman (sorry Batman you ARE the BEST comic book character of all time haha)because Green Lantern hits theaters next summer and Superman comes back in a few years as well....