I'm not sure about Dust Tactics Battlefield being the skirmish option, actually. It has much simpler (and reasonably solid, give a take a few weird terrain related issues that may have been FAQed ages ago) rules than Dust Warfare so it should work with larger forces. The rulebook may say something about upper limits thereof of course, can't recall that ATM.
No idea what of the old DT/DTB/DW trichotomy this newly branded version will feature tho. Could be anything from "names may change but the faces stay the same" to a complete revamp for all I know.