Well, a theory I suppose. If Megatronus's namesakes are anything like the First Forged, then arena combat is a favorite past time.

[It's not a whole lot to go on, pure speculation really.]

Not directly. Tarn is from my universe but I've been so removed from the war discovering his existence was new to me as well. But he seems to be an open threat to my kind dependent on faction. All my information is second hand, from either Drift or Ambulon though.