Experience Tumblr like never before
(and Thad, but shh)
Instead of Bart being saved and sent to the past by Meloni and Iris, he instead stays in the future and under the rule of President Thawne.
He is then basically groomed and made into a super-soldier/mercenary for the government along side Thad (who is Barts' twin and not a clone). The two grow up in VR together and the simulation basically trained them to be said soldiers.
Then they two get sent back in time by President Thawne to kill Wally - who is their father, because we don't have Barry.
In the end, the two have a redemption arc and end up helping Wally while still having the skills and mindset of children who were groomed into soldiers.
Pure autism bellow;
The reason Bart and Thad grow up together in VR is to create a sense of only having each other. They won't be loyal to Thawne, only to each other simply because they are the only ones they've ever known. The lack of human contact in Barts' backstory always seemed weird to me, since it wasn't really explored, so having the two of them will allow them to still have the sense of humanity.
The ageing problem: For those unaware, Bart experienced rapid ageing dur to the speed force and was only able to start ageing normally when Wally fixed him. This gets changed to the scientist fixing them, but after a longer time - so Bart and Thad are both ~15-16 when they go to the past instead of being 12-15.
Wally being their dad is so they have more of a connection (also I think It'd be really cool if Wally didn't know and Bart and Thad used it against him once he found out). Also because, again, there is no Barry.
Lastly, the whole VR thing. I always found it weird that the VR was like a weird game/fever dream. Like, why would the government spend so much money and time on a child to get nothing out of it? So, having the VR actually be more similar to something like Elden Ring or Skyrim where it's opened world and they can talk to whoever - but they have to fight a bunch of big bads. It'll also be really intreating to explore the lack of care for other human life because they wouldn't realise that people aren't just code until later. (murder twins, and when Wally gets mad at them they get confused because they simply don't understand)
Uhhh... yeah. Bart and Thad being brother and child soldiers for the government sent back in time to kill their father is something I'd like to see.
(I just want to explore the consequences of children being raised in VR and not being socially conditioned properly... man, I have issues).
Picture if you will, a Ultimate and/or a Absolute version of everyone's favorite thief Sly Cooper and his world.
To those who are not familiar, the Marvel new Ultimate Universe is where the Villain the Marker came to a earth and with time travel change everything to match his image, stopping the birth of many different heroes by various means. Eventfully you have new heroes showing up to take back the world from the Marker and his allies upholding the Status Quo.
The latter is similar, but focus on Darkseid corrupted a universe where heroes have to burn twitch as bright to stand up on a earth overcome by darkness and villainy. With heroes missing a key element of their background, but their core remains.
So picture if you will, a Ultimate Sly Cooper who never became a thief, or lost his parents. He married Carmelita and had a family. But always feeling like he was missing something. Only for one day to learn the truth of the world, and becomes a Master Thief to fight the status quo.
The second, a Absolute Sly, who made never had his Cooper gang, never had Bentley, and Murray in his life. Maybe he never had the Thievius Raccoonus, or any of that. He been a long wolf all this time in a world dominated by those like the Fiendish Five, the Klaww Gang, and Le Paradox among others. But Sly will always be Sly and he a Master Thief who fights the people and those who can't fight back.