The new core was supposed to launch in 2015, but I suppose the takeover by NXP probably changed things.
Could be it's delayed, but since they reshuffled the website, I think it would be strange if they'd axed their Power line.
I wouldn't be surprised if they came out with the chip later anyway, the e6500 cores are still complaint with the 2.07 Power ISA and the 3.0 Power ISA POWER9 chips aren't even out yet.
Since AltiVec is an integral part of the PowerISA now, I don't think it's going anywhere.