I thought a lot of Disney's movies had D2V sequels? Heck I think Toy Story 2 was going to be home video at one point.
I meant from Walt Disney Animation Studios themselves. The DTV sequels were produced by Disneytoon Studios, which was mainly created for that reason. Due to their budgets, the quality of those movies tended to be much worse. The studio was actually shut down back in June. The non-Pixar sequels would have been produced by Circle 7 Animation. It was launched in 2004 by Michael Eisner when it looked like Disney's deal with Pixar was not going to be renewed. Not long after, Eisner was ousted and replaced by Robert Iger, who quickly made a deal to acquire Pixar. Part of the acquisition was the shut down of Circle 7 and its Toy Story sequel, as well as having John Lasseter oversee all of Disney animation, leading to this current run. Though, I suppose it could be said his split responsibilities led to the "rough" patch Pixar found themselves in post-Toy Story 3. Though beginning with Inside Out, it seems they are mostly back.