Unless we bring in someone like Nugent-Hopkins, Wennberg, or Danault this offseason, I'd give Rasmussen the inside track for the 2C role next year.
Worst case scenario he can't elevate his game, we lose games in a good draft year, and we have a clearer idea of what Rasmussen is going forward.
Best case scenario, he rises to the occasion and proves himself as a bonafide NHL center. Even if not a legitimate ~40-60pt 2C, maybe a strong 3C and powerplay option like others have mentioned.
I'm not going to put any labels on Rasmussen right now, but I'm excited to see him continue to improve.