Woah, I usually try not to be cynical about your posts Ian, but that's the most "Ian" post I've seen in a while. Who even cares about Tony Hawk anymore? I think Nintendo could do just fine without Hawk, or Activision.
Of course I won't act like one game is good news, I just don't consider Activision to be that important. More important is getting some key third parties like Capcom, Square Enix, and even (ick) EA to make some quality exclusive games, or games that take advantage of the controller so much that even if they're multi-platform, they're practically "exclusive". Even more important is Nintendo itself proving the system concept. Look at what Super Mario 64 and Nintendogs did for their respective systems.