Well, John Cleese was considered for Zazu in the original, I don't see why not xD
Anyway, an artist (George Evangelista) made this after the announcement of the remake was made, it's his idea of what the movie might end up looking like. I personally like the art itself, it's pretty cool, but for an entire movie to look like this? I don't think so :P they better come up with something looking much better than this, otherwise it'll be a movie with many Aslans, which I think would look boring ><