I assume he’ll be a variant who went down a different path and becomes Doom rather than Iron Man
Doom in the comics was iron man at one point so there is a connection there
But really, this all reeks of desperation
Their phase is just shit so they called in RDJ to help them. A new actor would be better
I actually saw a John Campea video about this when it was a rumour about this earlier in the week..
Initially I thought similar to you… I’d rather they start afresh with this character… especially since Doom is my favourite Marvel villain from the comics… with his nation of Latveria I think it’s a character that deserves to be fleshed out much like Black Panther and Wakanda was… but I just can’t see much of that if you just make him a Stark Variant.
But the more I’ve thought about it the more I actually think they could make it work and actually it could be a masterstroke.
Hear me out… F4 comes out in a year… and from what we’ve seen it looks like its based in a different universe in a technologically advanced futuristic looking 1960’s time period. We also know the villain is Galactus.
The way I’d do it… I would have a variant of Howard Stark over the course of the film have a bad falling out with them and end up with some countess from Latveria.
Then have a post credit scene where a bitter Howard Stark is in Latveria plotting his revenge against the F4 and you have it ending with the sight of countess pregnant…
That’s my vision for it anyway… lol