Sides: All the lanterns from dc including black,white,green,yellow,blue,red,orange,violet,indigo vs all the mutants from marvel including x-men and so on (not really a marvel fan)
Some advantages of each sides:
Lanterns: Have the power to create whatever they think of like... Green lantern makes a mini gun with exploding rounds (of course if the bearer's will is strong), also each lantern has special traits like... Black canreanimate (not resurrect people), Green can create objects of their own will, yellow can do kind of the same as green, white can actually resurrect and so on...
Mutants: Most of them have different powers but mostly related to others in the same way like telepathy where you can read,control and so... peoples mind, fire, telekinesis and yade yade ya forth so on.. and there have more numbers like millions
Preparation: Have two weeks warningPlace: Takes place on earth because nearly all mutants can't freaking fly into space Rules: 1. No other heroes/superheroes or villains/supervillans can really interfere
What i think might happen: I'm a dc fan so i obliviously i choose lanterns and heres why;
The mutants are on earth cause all the other lanterns all in space except hal jordan and so on...
The mutants will try to mind control the lanterns but the white lantern will block it with their mind relay and been invisible while doing it plus resurrecting/healing lanterns if they get injured
The yellow lanterns will strike fear into the mutants causing them to fight each other and go chaotic thus breaking the chain between mutants.
Wolverine will kill some lanterns but then hal jordan and john stewart, create out of their own will imprisoning him since he can't die easily.
Magneto will use metal to kill lanterns but stopped by red lanterns causing xavier to go mad by the red lanterns rage so he starts to kill his own mutants
And so on... the lanterns win!!!
So yeah choose your side and conclusion how they would win
And your allowed to change some of this if its too unfair