I love PTN too and wish it would return. Given the Hyperion and FL theaters are still sitting empty, I am not optimistic about PTN returning soon. The fact DLR is inserting relatively cheap temporary entertainment for Pixar Fest at these two venues is evidence of not wanting to spend money on too much entertainment right now. It would have been great to bring back a real stage show to the FL Theater and something unique to the Hyperion for Pixar Fest.
I presume it's because they don't want to spend money on a new permanent show for the Hyperion if the rumors are true that Hollywoodland is the ultimate location for Avatar. Not sure why the FL Theater will only have an "interactive" Pixar experience instead of a show, but at least they are trying out something unique.