Stories recently circulated that Pixar had been called in to help tighten up some scenes in TRON: Legacy and even rewrote a few pick up shots. Now that same crew is being brought in much earlier in the process with a reading of the Muppet Movie script up at the Emeryville Studio.
The Hollywood Reporter has more details on the reasons behind the partnership. I believe this is exactly what Bob Iger had in mind when he purchased Pixar. This sort of cross-pollination will help spread the creative techniques of Pixar across the Disney Studio and soon these brain trust consults won’t be needed.