The DC Extended Universe is the shared universe of multiple movies centering on several iconic characters from DC Comics. There are 3 films so far with more on the way, as well as an upcoming TV show called Krypton which will share continuity with the films. The franchise is DC's answer to the Marvel Cinematic Universe.
Power of the Verse
Nowhere near as strong as their comic book counterparts, however the franchise is relatively new and thus has a lot of room to grow. Current top tier characters are Superman, Wonder Woman, and Doomsday, all of whom are on the high end of Multi-City Block level attack potency, with Doomsday in particular possibly being higher than that, up to Small City level, due to tanking a 1 megaton nuke.
Supporters and Opponents
Green Lantern Corps
Justice League Dark