They've confirmed that they're working on one, but that's about all they've confirmed...
Some have speculated that it'll be based on Intel's new X series SoC, what they based that on was solid, but it wasn't concrete, we need more info.

Their focus remains on J1, Sailfish 2.x, & the Tablet*, I doubt we'll get any detailed & solid info. till Q4, possibly as late as Dec.
I'll probably walk away if it's later than that, there's just way too many other goodies out there nowadays.

But we digress, this is the "Jolla in Oz" thread, not the J2 one, there's already a "J2 speculation" thread.

*plus just continued broadening of all their infra/logistics/partnerships etc