User blog:CrashBash/"Fantasy Fights" themes - New Series

As you know, I do like making my own little Fantasy Fight style comics, and with the new series, I've been trying to think of some possible themed match-ups, using as many of the competitors from the 2016 series as possible. I have quite a few, but I was wondering if you guys had any thoughts of how to theme the competitors together.

TWO ROBOTS
 * Draven vs Chompalot (Dragons)
 * Shockwave vs Eruption (Disaster aftereffects)
 * Supernova vs Pulsar (Stars)

THREE ROBOTS
 * Nuts vs Chimera vs Gabriel (Axlebots)
 * Foxic vs Terror Turtle vs Thermidor 2 (Animals)

FOUR ROBOTS
 * Bonk vs Terrorhurtz vs Thor vs Glitterbomb (Axe Attack 2)

Any thoughts beyond that would be happily appriciated.