WildFly 12 CR1 has just been released (2018-02-26):
I think we should get ready for it in devstudio. Currently we only have an adapter for wf 11. I checked and it seems to be working ok with the wf11 adapter from what I can see. Of course it will give you a warning that the versions don't match.
Please let me know if I can help you test the compatibility of the libs or some other stuff. I think there's no rush, it can wait for AM3. And it can be tech preview.