The most intriguing rumor about The Incredibles (though, to be clear, this is ONLY a rumor) is that it may pick up about as many years after the first one as it's actually been since 2004, catching up with Bob and Helen passing the torch of superheroing to their kids. The best of the Pixar sequels is Toy Story 3, and a lot of its quality comes down to one brave decision: to acknowledge the passage of time. Cartoons don't have to make their characters get any older (see The Simpsons and Family Guy, whose kid characters haven't aged a day since their series began) and it can be reassuring to think that Superman, Batman and Spider-Man don't get older either, or at least not at the same rate we do. But The Incredibles already has some acknowledgments of aging built in, as Mr. Incredible struggles to get his middle-aged body back in shape and Elastigirl looks in the mirror and sighs about what birthing three kids has done to even her flexible figure. It's a bit sad to think that they won't be able to carry on doing what they love forever, but the Toy Story films manage to be uplifting even while coping with mortality. The Incredibles doesn't have to follow this exact path to be a great movie, but it would sure create a lot of new challenges without undoing any of the triumphs of the first film.
T Campbell has written quite a few online comics series and selected work for Marvel, Archie and Tokyopop. His longest-running works are Fans, Penny and Aggie-- and his current project with co-writer Phil Kahn, Guilded Age.