Yes. Absolutely, and I’ve made a similar comparison to Darth Vader and Anakin in the prequels.
BUT that’s why I would have some very specific rules. First off, with Doom, I would make sure we established him as the ultimate bad guy before we ever saw his backstory.
And then, my idea of combining it with the FF would prevent over-exposure. We could just get glimpses of him while devoting more screen time to the others.
And even as a child, I wouldn’t make Doom feel like a child. He wouldn’t be sad and lonely and afraid when his mother died. He’d be angry that she was taken from him.
When 10 year old Victor is confronted by gun-wielding Latverian soldiers, we should feel fear for what will happen to the soldiers, not the 10 year old.
I’d model young Doom more on Damien than Anakin.