He transmigrates to the Marvel Universe without realizing it. When his System awakens, he gains the ability to resurrect the dead, and can recruit them as his underlings afterward. From then on, Fox's recruitment drive never lets up.
"Captain America, come be my underling!"
"Sure thing, boss."
"Iron Man, how about you?"
"Of course, boss. Need some spending money? I've got you covered."
"Thanos, quit being the head of family planning and come be my underling."
"Fine. You can have the Infinity Gauntlet."
And just like that, nearly the entire Marvel Universe becomes Fox's crew, and he is admired by millions.
This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.
Not Steve Rogers? Steven what the hell?