Not for quite some time, I'd guess. MissKathy posted earlier in the month here looking for beta testers, as a lot of the previous testers can't be contacted. I imagine it will take a month or so to sift new applications, etc. before testing can even start. Also, there's also the 'Mystery Game' in development as well. Whether beta testing of both games will take place at the same time or not depends I suppose on how far advanced they are.

The Preview page for VF3 just says 'some time in 2015'. However, in the past game release dates have slipped , with a couple of games 'to be released in' a particular year haven't arrived until the next, so don't hold your breath.