My guess is the purpose would be to enhance the little bugger with the sail updates from the B series to make it smoother and prettier than it's present incarnation. Enhance the stability and precision, keep the speed, make it prettier and a general refresh all add up to a boost to sales for that model
Perhaps some handles sized and shaped specifically for the size and 2 frames (race + something) and it sounds like a good idea to me. I don't get monster winds often enough to justify the cost of a Bazzer made Rev (Xtra Vent), but a factory made Rev II vented could make a welcome addition to my bag for those days.
In addition to the sail cut refinements that come with the B, the B-2 is coming with Race rods and 11" handles with leaders, all recommended with 50# line in most reasonable conditions.
Still in the mill, but it may also come with a 2nd frame set.
Trick is, the Rev II has always been a fun little kite, but with the straighter leading edge and normal cut, it's been a bit LE dominant in flight style.
The B-2 goal is to bring the B-Series performance to a smaller package... Enhanced precision and handling, but faster and even more agile.