Here is an archive of all the past top five lists I've one over the years.
Let's take a look at the top five best superhero battle cries (just superheroes and just from comic books)!
First off, I don't count the Green Lantern oath as a battle cry. Just figured I'd get that one out of the way.
"This is a job for Superman!"
This one really doesn't count, either, as Superman most commonly says it to himself. That's not really how a battle cry work. You sort of need to actually cry it out loud.
This is a pretty cool battle cry, but Thor really doesn't use it THAT much. It is most famous for the time that it was used in contrast to Loki's own personal battle cry...
Not a bad one, but it really didn't come up quite enough for it to reach classic stage, I don't think. It's interesting that it is used in the above piece in such a way to suggest that it WAS a classic phrase, though.
"To me, my X-Men!"
It is a bit of a stretch as a battle cry, but it is still pretty cool, and it was close enough to make it here.
"By the Hoary Hosts of Hoggoth!"
Doctor Strange doesn't really have battlecries, per se - they are more incanctations or exclamations of surprise, but I figured incantations and battle cries are so close that it was worth giving it an honorable mention.
This one is awesome, but falls just a liiiiiiiiiiiiiiittle bit short, perhaps because in my mind Johnny Storm tends to use it in situations that wouldn't typically be described as "battle."