I'm not so sure cats don't count as super-powered already. You do know Chernobyl has a feral cat colony living in the remains of the reactor core... because it stays nice and warm during winter... and apparently they suffer no ill-effects from continuous exposure to radiation levels that would kill a human within minutes.

Hmm... there's an idea, 'and the cat came back' i.e a breed of immortal, indestructible cats. Now all they'd need is opposable thumbs and a higher IQ and both traits already exist among other cat populations. Of course, being cats, I'd doubt world domination would actually be an objective for them. Too much effort!

Oh well, just so long as it's not super-powered cockroaches... [Marvel did that one, it was gross.]