Hopefully masterchief, but that is the halo fanboy in me talking. I doubt any current gaming 'heros' will have the staying power of mario.
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right