To be serious, "Micheal", as others have stated, is some postman from Alaska who has been imbued with all of the powers of every mutant who lost their abilities in M-Day. It builds on the "energy cannot be created or destroyed" logic from HOM #7. Because, you see, because comic writers only know elementary science, the MU is ruled by elementary science. Sort of like when Spider-Man uses his "genius" to figure out some science trick that any A-student in 8th grade knows to beat Hydro-Man or something.
To be critical, Micheal, or "The Collective", is a walking plot device, not unlike Doomsday was in the 90's DEATH OF SUPERMAN series. He has no personality, no motive, even a rather basic, general design. He merely serves to attack what the story says to attack, kill who the story says to kill, and what not. And naturally he is nearly omnipotent with all that power, meaning the NA will either:
1). Talk him down.
2). Some "character from nowhere", possibly Daisy, will appear, beat Micheal with no effort, and explain the situation (don't laugh, Bendis pulled this trick with DISASSEMBLED and SECRET WAR).
3). They pool together their collective skills/experience/genius and figure out something superheroy and terrific to do.
Personally, I feel it would have been cooler if all those powers had instead went into a C-Lister Avenger foe, maybe Whirlwind or something, so that this new cosmic threat would actually have a personality, a motive, dialogue, etc.
But at least the team is assembled, and all the powers of mutants who, mostly, are reletively replaceable to the X-mythos, went somewhere. And this is probably the book's best arc, which isn't saying much.
