All this talk about how it's unrealistic for the world to be the same when there exists Stark's infinite clean energy from the arc reactor.
Meanwhile we're all here in the real world with infinite (well, centuries) of clean energy from regular old nuclear fission mankind is barely tapping its potential because our govts. and elites don't
want us to have that. Man, Friends of the Earth campaigning has done a number on our society. If they don't want us to have nice, clean cheap power in the form of nuclear power stations, they certainly don't want us to have it in the form-factor of a baked bean can. And before anybody says "yes, but they'd want it for their militaries" that was the entire plot of IM2, trying to keep it out of their hands. IM3 as well, really.
Btw Doom Blazer not only stops at Goku, he also wants Godzilla to have a role in the MCU:
You know what? Fuck it - I want this! MCU has wrecked itself, might as well have fun. I want to see the Marvels fighting Shin Godzilla.
Captain Marvel flies up and blasts it with energy. Godzilla glares and responds with nuclear breath.
Hulk leaps into the air fists clasped for one of the WWE slams. Godzilla waves paw and Hulk disappears through a skyscraper.
Antman enlarges to 20m tall. Still looks tiny compared to Godzilla.
Ms. Marvel is not yet done squeeing adorably over how cool an actual Kaiju is.
All seems lost and then... Fantastic Four theme starts playing. A burning figure appears in the sky, a beautiful blonde appears out of nowhere on top of a nearby building, a lean and serious faced scientist is pouring over a strange pile of instruments and a gravelly voice emerging from an alley says "It's clobberin' time."
Hell yeah, if you're going to go fantastic, go Fantastic!