Collecter of Gobots and Godzilla
Setting aside stuff that will get people bad-faithing at me, Duke felt here a lot like Jetfire did in Void Rivals. Whoa, it's a character from something! Now he's leaving and taking his plot significance with him. Read his comic when it comes out!
I think this is my biggest concern about this whole shared universe thingy. Since it's explicitly so right from the start, hopefully all the writers involved have a shared vision or roadmap that will come together eventually and make sense to us readers. So far (I am a couple issues behind, tho), it seems like all the crossovers have been less than vital to the stories currently being told, and exist just to remind everyone that it's a shared universe.