Ray Muzyka and Greg Zeschuk have recently indicated
that they'd be open to a Mass Effect
I'm starting to hope that The Old Republic bombs spectacularly after the first month and scares Bioware away from the MMO market.
Doubtful since TOR has set a new record for EA in terms of pre-order. If the game is anywhere near as good as the early buzz suggests then TOR will be about for many years to come. However no need to fear because I doubt even if an MMO Mass Effect came out that EA would stop making console games in the universe.
Also any MMO would be 4-5 years away as I doubt EA would want to have TOR & ME mmo's competing in the near future and MMO's longer to make.