Apparently, this is being planned by the same wackos working on Thomas and Twilight Sparkle vs. The Mummy. Doing the whole thing all over again with a different cast of characters. Makes a lot of sense.
Pooh's Adventures. A meme that sounds quite regular for a strange mind at first, but when you find out that they have plans for a family-friendly "Pooh's Adventures of Avatar", then everything is ruined.
Join me as I take on the worst and most bizarre of these fan-created crossovers, watching as much as I can and browsing the wiki to see what other ideas they have up their sleeves (and won't bother to complete).