Yeah, but unfortunately, they've seen that they can make money using humor/rabbid-based party/mini games, so ultimately, since they're rational, sane publishers, they'll keep doing it until they can't make money.
I'm on the fence over whether I want to buy Rabbis 2... it had better be REALLY funny or else I'm gonna overlook it. However, I probably would snap up a Rayman platformer or Red Steel 2 without a second thought. (Okay, I'd think for a second before Red Steel 2... but I'd prob pick it up anyways.)
One thing about Rayman is... Ubi prob wouldn't want to launch him against Mario. Could we see a Rayman platformer in 2008?