With Disney's acquisition of Pixar, the studio will hand the "Toy Story 3" to Pixar as part of its deal to acquire Pixar. Apparently, it has yet clear how the change would affect the production schedule of the flick at the latter studio.
To your notice, the production of "Toy Story 3" actually has been started at Disney's new animation unit, Circle 7, in Glendale, California. The unit reportedly will not immediately closed, yet its future is yet to be determined. That being so, the future of "Toy Story 3" remains uncertain as well.