Not sure if Hasbro's licensing deal with Marvel would allow them to make DC toys. <shrugs> Not to mention that Hasbro had issues with DC using the name Bumblebee for the DC Super Girls toys (but they settled without needing to go to court).

I wouldn't mind seeing more Machine Men characters appear in Transformers, as we recently had with Legacy Crasher, Gens Selects Bug Bite, Kingdom Road Ranger etc. I don't expect there to be an explicit "Go-Bot x Transformers" Crossover thing happening, as Hasbro wouldn't want to have Machine Men directly competing with Transformers, but I think the occasional cameo appearance in other TF lines would be neat, particularly CHUG. It would certainly be nice if they could at least do the rest of the eHobby Go-Bot characters in CHUG; namely Treds, Smallfoot, Bad Boy and Pathfinder. Seems like missed opportunities as easy repaints of Kingdom Warpath and Legacy Cosmos, so I guess there isn't any real motivation from anyone in Hasbro to do this.