Populate Mars with amphibians, Dunkleosteuses and dinosaurs, while also having it 1/2 covered in water.
Have 1/100 of the population converted into a 15-foot-tall invulnerable muscular metahumans with unreplicable DNA and superhuman condition and intelligence, and see what happens.
Have cheetahs manifest machine guns out of their shoulders.
Resurrect Plateosaurus as a species.
Make Shin Godzilla real as a character.
Make my own version of DC Cinematic Universe.
Have hippopotamuses explode in a napalm explosion once they are killed to prevent poaching.
Since everyone thinks they can do whatever they want to do as a God instead of as Doctor Manhattan, I might as well join in that Doctor Manhattan can't do freely, merchandise the blue junk he has.