If there was an alien-based fighting game...?

If there was an alien-based fighting game, how do you picture it?

Street Fighter, Tekken, Dead or Alive, involved fighters from various countries around the globe.
- Ryu had a connection to the Satsui no Hadou while Jin had a connection to the Devil Gene

Mortal Kombat involved fighters from different realms.

They should make a fighting game that involved fighters from different planets.

It can be a mix of War Planets: Shadow Raiders
https://youtube.com/watch?v=1t-9bHhuDUg

Dragon Ball Z
https://youtube.com/watch?v=S9kN0pct-Q8

Ben 10
https://youtube.com/watch?v=Ofr23iT7-80

Including Star Wars, Ratchet & Clank and many other pop cultures that involved space.