If it really is 2015, it'll prolly be ~Dec 2015 (if they're still in business), I doubt it'll be much earlier than that...
If it is much earlier (i.e. Q1/Q2), it'll most likely end up being an ordinary device hw-wise, perhaps more-so than the 1st Jolla.
These guys can't compete on the same hw life-cycle as Android vendors (big or small), that may change in the future with enough market momentum.
Before concentrating heavily on the next phone, I'd like them to develop/leverage TOH concept much more than they have so far.