The Earth Green Lanterns vs. The Phoenix.

[Anarchist]

Yeah, Spider-Man had a plot armor in its purest form (just as Captain America had his good old plot shield when he knocked Namor out of the Sky with it, lol).
Gladiator didn't seem uncofident at all, on the contrary, he was fully bound and determined on destroying the Phoenix with his own hands.

What does creating Hell on earth do for magic? Does that boost her?

Yes, very, as it does to every other Hell-Lord who is in his own domain.
Plus, she can summon a hell of a lot of demon-minions there.

[Yeoman]

Kyle could beat Gladiator

Classic "I'm gonna Hold this solar system together with my mind and contain a super-nova" Kyle, maybe. MAYBE. If Gladiator choose to stand there like a goon.

That guy has long since been retconned out of existence by Geoff Johns, even before the new 52.

[Slade1]

Classic "I'm gonna Hold this solar system together with my mind and contain a super-nova" Kyle, maybe. MAYBE. If Gladiator choose to stand there like a goon.

That guy has long since been retconned out of existence by Geoff Johns, even before the new 52.

Classic Ion version of Kyle would be enough.