>Sentry doesn't like him.
Sentry has the power of a million exploding suns. Superman is empowered by the Sun. They would probably get on quite well, though Superman would exacerbate Bob's mental issues by being inadvertantly intimidating.
How would he do in the Marvel universe?
Jason Watson
Aaron Butler
Peter Parker would work with him at the buggle. Clark considers him his best friend.
Since no Lois, I guess he either goes for Carol Danvers, Storm or... Sally Floyd.
Grayson Bailey
He hates Galactus after finding out that he is the reason why Krypton died.
Hasn't found a single alien species that likes Kryptonians. All of them, including the Kree and the Skrulls, hate him and his extinct arrogant war mongering species.
Super Skrull wants to have his dna.
Jacob Smith
Explains why he beats kryptonians all the time without a sweat
Easton Young
New scenario:
He gets dropped into the Marvel Universe
How well would he do?
Aiden Foster
Golfs with Doom
Joseph Perez
one-off Iron Man villain who everyone ignores after first appearance because hes just a Stane knock-off
Bentley Cox
Doesn't shine that much. Marvel's super geniouses are smarter than DC's.
Still, occassional villain for Iron Man and the Xmen.
Jace Lewis
JJJ hired Clark and loved him, thought he was the best reporter the Bugle ever had
Elijah Davis
Gets over his Ego with Superman since he isn’t there in the Marvel Universe, can use his intelligence without that stupid plot device of not being able to see someone wearing glasses, and actually becomes a threatening villain for once. I would see Lex rising up the “hierarchy of Super-geniuses” or so to speak, considering he’s a new guy who just appeared out of nowhere with a intellect that can just allow him to do anything because he was made to fight a god who could do anything with plot (Super-man)
He would probably be better off than the other Super-geniuses because he has knowledge of the DC universe and it’s secrets and could probably exploit that in different ways, like how to use fifth dimensional energies or whatever that are beyond the Multiverse.
In the end, I would see him threatening the order of the established “Smart people” in the Marvel Universe. His plot device mind without that ego barrier of Superman would actually have some use for once and would be much more dangerous than ever before, probably getting rid of all the super-geniuses in spectacular fashion by exploiting their weaknesses, while when in that world he would have none because he sees all the heroes as being selfish and not the ideal people aspire to like Superman. In the end, I would see him probably being the new smartest person in the Marvel Universe, especially considering when he was in the DC universe he could do bullshit that is on higher levels than what Marvel Super-geniuses could do when he really wanted (Like for example, he could trick Brainiac 13 and outsmarted him, had a debate with Death of the endless herself, ect.)
Lex Luthor really knows no bounds without his ego block that prevents him from just doing whatever he wants. He takes the #1 spot on the Intelligence hierarchy in the Marvel Universe, surpassing that black girl or whatever (and reed, and everyone below him.)
I would be surprised if found a way to gain omnipotence without his ego.