Other than the new sled being an replacement for the Apex, my guess based on the fact that it kind of looks like the Phazer is that is going to be called the Exciter, which has been rumoured for an few years.
It will be based on the Phazer, and they will basically just add another Jug to the engine giving you an 750cc 120 HP tripple that spins at 11,000 rpm. It could sound pretty mean and should be right around 500 lbs.
The reason to use is I would guess that this engine would weigh substantially less (and take up less space) than the 973cc Vector engine, but with Gear reduction have similar HP and Torque levels.