When questioned on how far Mass Effect 4 is in its development, Yanick Roy simply implied that the game is half way through. The studio director was referring to the stage of development Mass Effect 4 is in.
If this is true, then Mass Effect 4 will certainly see a 2015 release date. On the other hand, the world can get the chance to catch the first glimpse of the game during E3 this year.
Aside from all of that, Bioware is still considering to bring the first Mass Effect trilogy to the next-gen consoles. Of course, this is only if there is a great deal of demand for it.