yep, in IDW we've had a good year or two of other characters getting the spotlight. Hardly any of them all that new to be fair, but many of them put in new roles. In western fiction I think James Roberts has given Chromedome more personality than the last 25 years of the character's existence to name just one. There have been a few new characters created along the way as well, and similar to the Generations line, supporting cast members from other series have been incorporated into the primarily G1 story (Rattrap, Sky-Byte) without any problems.
I'm definitely okay with something new coming along, but don't see a complete turn away from Prime/Megs/BB/Screamer any time soon.
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Astrotrain, Ramjet, Sunstreaker, Sideswipe, Blurr, or 3rd Party Motobot Arcee, iGear Ratchet and Ironhide.
Also looking for Universe Repugnus and Overbite, Frostbite and Longhorn and any Webdiver toys.