Make your own mega evolution, then shit on the mega evolutions other people made.
We're never going to see mega evolutions come back so we might as well play around with the corpse.

>Easy mode:
Make a mega for a Pokemon you like or think deserves a mega.

>Hard mode:
Make a mega that won't be banned from OU.

>Impossible mode:
No special snowflake abilities.

>Dante Must Die mode:
Make a mega for a Pokemon already in OU that doesn't put them into ubers and also doesn't completely outclass its base form.

>??? mode:
Draw art of your mega.