@HellisIs there somewhere I can find a description of the tiers?
It pretty much goes like this:
S-Tier: Think Superman. Think galactic-tier villain. Think the Hulk once he's gone full "I can wipe out all of Asgard on my own" angry. Those are the guys you don't wanna mess with. (Another way to think of it: these guys can save or destroy whole planets... or star systems... or bigger things.)
A-Tier: Hard hitters, but nowhere near as hard hitting as the S-Tier. Batman is A-Tier; he can't typically go up against the villains Superman can, but if they're on the same team working together he's still an incredible asset. Ironman would probably be classified as A-Tier as well. Vandal Savage would probably fit here, too.
B-Tier: We're getting less threatening, but these guys are still noteworthy in a fight. Deadpool would probably fall here, as would a lot of less famous X-Men. I'd put Green Arrow here, too. They can fight big bads, but they're more of a street level opponent. Green Arrow can slug it with the big boys and evil corporations, but he's not a true game changer like Batman.
C-Tier: Us. Yeah, we're not noteworthy at all.
EDIT: Another thing to note is that being able to beat characters of a tier above you doesn't make you that tier. Batman, for instance, could kill Superman if he wanted; that's because he can exploit Superman's weaknesses REALLY EASILY. The Flash is an A-Tier, POSSIBLY super high B-Tier superhero, but some of his chief enemies are B and C-Tier sillies like Captain Boomerang. (Interestingly, the Flash in certain mediums can actually be more powerful than Superman. He can basically break the laws of physics to move faster than light [Hi "Speed Force"!] in Justice League Unlimited, and actually defeated a supervillain that
the entire Justice League combined couldn't. But he's typically less powerful than Superman, despite having some serious S-Tier moments.)