[Agentjx]

Considering the vehicle theme, we may have function overloading on the term "demoman", or failing that, "monster truck".

[Agentjx]

Calling it now: they'll have some reference to the phrase "Cue the explosion", presumably for their finisher(s). (My bet's on it being a stylized QZX on buttons pressed to activate finishers.)

[Darth Gonzo]

From what I've heard the mecha are going to be vehicles that crash into each to combine, so maybe it's themed off of a demolition derby.