I feel they will do an MMO also, but I believe they will still do a single player as consoles make a big portion of their sales.
I was hoping for a ME MMO right after the release of ME2. It's popular enough and has a large number of fans, so it would be profitable. I'd rather have a MMO than a SP game filled with 10-20$/€ DLC every few weeks.
Na I would not play it. As much as I love ME. I would not buy or play the MMO. I just do not like them. To me MP destroys great SP games. You want MP have co-op only. Thats fine by me. But I want another ME story SP game no MMO! It will just make me want to walk away from that company even more if they do a MMO.