And here shall be born the new Hero.

What if...

Jason todd from the Titan (TV 2018) show, decided
That Dick Grayson is the only person he can trust after being de-aged from a villian that calls himself the 'reverse-ager'.

Jason that was Red Hood while he tried taking down some Child-Traficers was hit whit one of these werid spells of an meter-human quikly turned from red hood into some 15 year old Child.
In an robin suit.
Now looking for Dick grayson.
to fulfill the mission he alredy fullfilled.

Of course when a Robin that ends up infront of Nightwing telling him th at a few people that he knew back then from the circus where in Danger it wasnt hard to get behind the point.

Jason had been de-aged. and he didn't knew that he turned Evil.

Dick saw his Chance.

Or, Jason has been de-aged to Jason from Empisode 5 (the end of it) season 1, and dick finds out.

Flash and wally will be maby in a few chapters (also cisco and more characters from the flash)