i think this review says it all:
The main issue facing the writers of a superhero smackdown like this is concocting a reason why, given all the evil out there, they have to fight each other — as well as, in this case, coming up with a way to level the playing field when one hero is essentially immortal and the other is just a really buff rich guy with a costume and lots of gizmos.
The filmmakers would seem to have thrown up their hands at how to gracefully integrate Wonder Woman (Gal Gadot) into the action, simply hurling her into the epic final battle without significant preparation at all.
Didn't read that review, but that really shouldn't be an issue after MoS. The reason why is perfectly obvious:
--Aliens arrive on Earth to find their missing alien ancestor, whom earth had no idea was living there all along.
--Earthlings are like "WTF, these spaceship aliens are big and scary, and they are threatening to annihilate us if we don't give this guy back?" They instantly turn on Sups and are like "dude, gtfo of here." Military comes after him. he surrenders, but then has to fight Kryptonians...even when he's fighting them, the military is still shooting at him at first.
--Sups and Zod & Co. destroy all of midtown for the whole world to see. Clearly...these creatures are too strong for any known human or human technology to defeat them
--at the end, Sups destroys an Army satellite deployed to spy on him. "How do we know you won't turn on us?" Sups: "I guess you'll just have to trust me!" lol, yeah right...
It ends with the US military and probably some earthlings coming around to accepting superman as a friend, but not completely. Obviously, this kind of dude will still have his skeptics (shit, look at RL earthlings: a not-insignificant amount of Americans truly believe that our own president is a secret muslim with magical powers bent on dismantling the country and the world. People are not only fearful by nature: THEY ARE FUCKING DUMB)
MoS is about as perfect of a Superman story as you can hope for, and in a film no less. It captures the alien that is superman,
and the fact that earth never really needed him until his actual existence attracted the kind of danger that only he can fight. ....kinda profound as far as superhero derp-stories go.
This alien demigod stranger demolished Manhattan, defending it from related demigod evil assholes. Why wouldn't at least half of the earth population assume that it wouldn't take much to convince Superman that he might as well decide to become their supreme ruler? Hell, they never trusted
Batman and all he can do is punch and kick.
Clearly, Batman, seeing himself as nothing but a good guy, thinks he is the only person that would ever be capable of stopping this demigod before he truly does go all evil. It makes sense within its own world.