Not quite sure what you mean, but i did not see any news about Keystone. If you need some alternative, i switched from these 2 towards intel XED - but then again my only target is x86_64 (amd/intel).

alternatively, i think LLVM also provides frameworks to do basically the same things (which does support a lot of platforms) and they also have good docs.

again not sure what your ask is, so its a bit guesstimate info provide :') sorry if it's off the mark!