I don't understand how anyone can not be remotely interested in Red Dead Redemption, have you seen their vidoc series?
I haven't watched any trailers, just seen some screen-shots in magazines. I haven't done any research on it because I don't think It'll interest me. I doubt you will get LEGO Harry Potter, I don't see what people don't like about playing little LEGO figures in Hogwarts playing scenes from the movies/books with bits of humour injected into it.
I'll stress here though, I'm not saying it looks bad. I'm not saying it looks good either, I'm happy that you will enjoy it and I'm sure reviews will be positive, it's just not my kind of thing.