Has Batman ever developed a Super Soldier Serum (similar to the one that was successfully used on Steve Rogers/Captain America) and administered it on himself?
In the DC Universe (main DC continuity) Bruce Wayne/Batman is depicted as an individual with peerless intellect. In the movie Batman Begins, Batman is able to develop an antidote to the fear-inducing hallucinogen developed by Crane and consequently administers it on Rachel and saves her.
However in Batman Beyond, Bruce Wayne decides that given his old age his time as Batman is over and subsequently he retires. Thereafter, he trains Terry McGinnis to become the next Batman.
So, did Batman ever develop and test on himself a Super Soldier Serum that would have increased his stamina, speed and strength and also slowed down the aging process, allowing him to keep on fighting crime even in his old age?