Thread:Gijimu/@comment-5448995-20151106042307/@comment-4651179-20151106220020

The last option is most likely.

Sinister is a geneticist, he's probably just experimenting with mutants to find a cure for Terrigen Mists or just for fun.

I don't know how could it be theorized Nightcrawler could be revealed to not be a mutant.