I haven't played Smash since the N64 days, didn't play it on Gamecube and generally avoided most stuff on the Wii, but now that I'm back Nintendo, I'm pretty excited for this and there seems like alot of new additions to the game. Plus, since Mega Man was killed off by Capcom, I think this is the first positive thing that has been done with Mega Man and respecting its roots with that awesome Final Smash attack that shows off every main iteration of Mega Man.
Shame it's not coming out on the Wii U till winter as I'm not too interested in the 3DS version which comes out first in the summer.