IDW's First Strike
Following 2016’s “Revolution” event — which saw IDW’s licensed Hasbro properties united in one shared universe — “First Strike” picks up with Earth about to join the Cybertronian Council of Worlds. That peaceful event is interrupted by Cobra, as Baron Ironblood — historically the British counterpart to Cobra Commander — has targeted all Cybertronians for termination, putting the Transformers in serious jeopardy. The G.I. Joes, led by Scarlett, and the Autobots, led by Optimus Prime, stand in the way in the face of extinction — enlisting help along the way from, apparently, an unlikely ally in the form of Soundwave of the Decepticons.
http://www.cbr.com/first-strike-hasbro-crossover-transformers-gi-joe-idw/