Per this review over at wargameguru, the *only* expansions currently planned for Dust Tactics are the repackaged units from the starter set which have already been announced: wargameguru.weebly.com/in-focus-review---dust-tactics.html
So, no Operation Cyclone, Operation Paperclip, etc. No command squads, snipers, Vril, or air units.
I hope that FFG will confirm or deny this--it seems like quite a few people got into the game specifically because there seemed to be a plan to release regular updates for it.