Still:
Prowl - The background stuff you guys were talking about shows up in Shadowplay and Earthfall, but keeps calling back to AHM, and generally to Barber's work on the character in various flashbacks and post-Megatron return in xRID.
As for the beast modes, I see the 'pretender' solution as a way of explaining the different similarities (allow me this one) between Eukaris and the Chimeracons. In fact, given that the name exists, it is possible that Roche will explain their full origin before the mini is over.
That said, I'd go with the 'both' explanation, too. Eukaris is a colony which directly links to Onyx Prime, almost as his haven for beast-modes. The Chimeracons have 'bio-disguises', as the Dinobots sort of did in Spotlight Shockwave - but Earth also has ties to Onyx Prime. While I'm not sure Roche may be behind it, I would suggest that Barber has something in mind to tie it all up.
Will add more as I keep listening!
