They did a little glimpse of that in final crisis, Bruce becomes a doctor like his dad.

It'd be a gift for everyone

He'd be your standard spoiled rich kid.

There wouldnt be a batman bruce wayne would just be a spoiled rich playboy.

Batman would instead become Spoiled Bratman

I wish there was a universe where all the Waynes die and Alfred becomes Batman.

Batbutler

You mean the only sane member of the Batfamily?

I mean don't get me wrong, he'd be a great Batman.. possibly even too great, but he's also the only one that knows he probably shouldn't.

Whereas the Wayne's see a bat smashing through a window and decide to dress as bats and beat the shit out of people, Alfred would probably just call the exterminator.

If i remember Correctly, there was a Booster Gold Story Line, where he Saves Bruce's Parents, he became a Selfish Asshole that Cannot Live without his Parents. I think in the End Booster Travel Back in Time and Stops Himself from saving the Wayne's and the Selfish Bruce Kills himself. What a Terrible Story.