I'm really hoping Mercedes deliver something good this year. Presuming this is Michael's final, final season, it'd be nice to see him back on the podium, and maybe, possibly, a win.
I still refuse to acknowledge Canada as a good race on the basis that DRS robbed Schumi of a podium.

Still p1ssed off about that.
For the good of the sport, it'd be nice to see Mercedes close up to Ferrari, Red Bull and McLaren too. Plus a more successful season would hopefully mean Mercedes commit to the sport long term and don't do a Honda, BMW or Toyota - quitting 'cuz they aren't winning.