The Un-killable!
So Danny, now an adult and no longer actively a hero, is like 99.9% sure he’s immortal (the 0.1% is largely self doubt) because of this and an unwillingness to handle an 9 to 5 without killing his manger, he decides to become a daredevil by the name of Un-killable.
His shows r an instant hit. He’s able to do things that others would only dream, all with the causal attitude of a guy on a grocery run. As if jumping off the tallest building in the world and landing in a kiddy pool is just a normal Saturday for this guy. 
Now while people have come to the reasonable conclusion that he is a meta, their still 50-50 on if he’s actually un-killable or not. This is not helped by the fact that Danny refuses to acknowledge any of the crazy shit he does as anything unusual.
This all comes to a head when Danny does a show in Gotham and Joker (jealous of someone else taking the spotlight) decides to test just how un-killable he is. 
He fully expects it to be a lie. Fully thinks that if Danny is a meta, he’s not immortal. That with enough bullets, bombs, joker gas, poisons and just good old fashioned brute force the guy will die. 
As the night goes on however, he starts to reconsider

















