After seeing this I have a new take on their strat. I think that mp will appear but not on release. I am thinking a 1st free dlc release sometime after the game ships, perhaps just before christmas or sumpin.
Eeeh. Really unlikely, I think. Publishers seem to always want to put DLC in people's hands as quickly as possible, and launching multiplayer after the game comes out seems really weird to me.
(I mean, the reason they loved Day One DLC is because at that point the potential customer base is as large as it's ever going to be. Why delay anything by a month, when a substantial number of players will have traded the game back, or will have put it down to never touch it again?)
One of the big reasons for including multiplayer in ME3 was to get people hooked on it straight away, and to get them to keep playing it, which would prevent players from reselling the game and provide a much bigger sales base for their singleplayer DLC. I can't see any reason why they'd delay the multiplayer, or not include it with the base game.