If, SOMEHOW, anyone doesn't know about this, you should start:
This, in my opinion is the only super smash bros release that we should be waiting for. 4 years in the making, and finally in full production form, Project M is not a demo anymore. They've managed to ADD BACK Mewtwo and Roy, and still have room for 5 more character slots. With 41 characters it's the biggest smash game ever, and with, as far as I've seen, unbeatable melee phyics, the BEST smash I've seen. Melee fans rejoice, the real sequel to Melee is here.
For questions about the video, those are the last characters to be added along with the rest of the cast, completing the roster.