I could only see the 27.5 getting a 170mm fork, (Lyrik?) there is nothing over 160mm for 29" as it is. (Would also line up with the 27.5 stumpy having 10mm more travel than the 29.
I'm placing my money on subtle changes. If it ain't broke...
Lower BB, slacker, longer reach. Will still keep the X-wing shape, Swat box and metric shock with trunion mount/linkage as gravesy and Keene currently have on their enduro's. Ohlins fork and 1x12 sram eagle might make an appearance as well...
I love the demo frame, but it won't work simply because you can't fit a dropper post in the short seat post, let alone no room for the internally routed cable.