Since we're now getting games ~3 months apart, I wonder how long a dry spell is going to follow ME2. AFAIK, nothing else apart from TOR has been announced. That leaves Edmonton and Montreal completely unaccounted for (apart from the comments on DAO2, but I kind of doubt it's going to be the next one out).
Actually I wouldn't be surprised if DA2 was the next one out, Bio put a lot of effort into the DA universe, I suspect a follow up to it to be the next release after TOR. But there was a comment by a Bio dev that is working on DA DLC, that his previous assignment was on an action RPG that was cancelled(my guess JE2). So either that was deemed unprofitable or EA has said use the IP's you've created for now. Which does make sense, they have the ME IP that is popular, which in two months time, is going to get it's second entry. Then you've got DA which they have just released, which seem to have also done well. Personally I'd be surprised if we seen anything not ME/DA/TOR related coming from Bio for the next few years.