Sakurai makes great games and I think it'll be better for him AND Smash if he doesn't make another one. Air Riders is looking great for a gameplay and visual design side of things and isn't beholden to dozens of other creators he's borrowing from, and I'd love to see him try something new after that. His last brand new idea depending on how you count it was either Uprising or Meteos. I don't need him on mainline Kirby either, HAL is doing a great job.