*THIS IS MARVEL CINEMATIC UNIVERSE THOR
Kat has one game under her belt and a new game and anime series on the way, so what better way to gauge her power than against the [live-action] God of Thunder himself?
Kat's basic powers: super strength, speed, durability, flight, gravity control
This fight takes place afterAge of Ultron, but let's please be reasonable and disregard any polarizing feats during that time frame (you all know what I'm referring to).
Thor is taking Kat very seriously because he believes she is like Vision in that her power stems from an Infinity Stone. Similarly, the thundercloud Thor summoned upon his arrival to the battlefield registered him as a threat to Kat.
They fight to the death in Hekseville, pictured below. BFR is not allowed and Kat's usual power constraints will apply.