I am very much in favor of ceasing the Pixar-ification of everything, but I do love Nemo. In fact, I believe you agree on this point, I prefer it to the subs at Disneyland. It's appropriate - undersea film, undersea ride. If they had put Toy Story in there, it would have been different.
I have no problem with Donald in Mexico, either. At least there is something fun for the kids now, and it's not like they changed it that much. And although some would cringe - I keep hoping at some point we will get the characters added to IASW like they did at Disneyland. It sounds tacky, but once you ride it you see how very, very well done it was, the characters all in the style of the dolls, and having fun trying to pick them out of the crowd. They are in the appropriate countries, and really add to it without taking away the original.
That said, I also really have no problem with new franchises being used. For example, although I have never seen the films, Iron Man/Stark Expo would be a fabulous idea for something at Epcot. I understand people who are of the opinion that Epcot shouldn't have characters at all, but I don't get the "non-original" part. It doesn't make it any more or less appropriate to me.
So I'd love the Muppets to take over the imagination pavillion - IF we got a REALLY NICE LONG DARK ride out of it. I don't care so much what they are doing, I just want to live my childhood fantasy of seeing the Muppets live. Plus, there is a whole theater right there they could use for a new Muppet Show.
Win-win-win, 'specially if they keep Figment and bring back Dreamfinder at the same time. Wait, I think I just designed the ride - the Muppets have to help Figment find Dreamfinder, and at the end we find him on his cloud car.
(Disney, no need to send me a check - but a FOTL pass to the attraction would be nice.)