There will two new full frame mirrorless cameras coming this year from Sony. One is almost confirmed Sony Alpha a7RII, to be announced in next several days, the other is a 50MP full frame sensor Sony Alpha a8 or Sony Alpha a9.
Sony Alpha a8 or a9 has rumored for a long time. Scheduled release date is in the second half of 2015.
Source from SAR:
We heard from our rep yesterday that there would be two new ff cameras announced both a7rmkii and a8?! He seemed to think that the a7rii would be as the a7ii, just better erg and is. The a8 is apparently the high MP 50+ body.
Read More: Sony Alpha Rumors