it doesn't matter when it said "game footage not final" it's talking all the game footage. kind of like how car commercials where the car drives off a cliff will say "do not attempt" at the beginning of it and then goes away, its talking about the whole thing. but thats not really the point. they don't work on graphics first and the rest later, its all being worked on at the same time. i can't find the video at the moment but there's a video on the development of the first epic mickey game.
the mickey in it didn't look at all like the one in the real game, i don't think it even had eyes, the point of that video was to show the game mechanics so far. that said, if this is a gif from tumblr, its probably fake.