Infinity War part 1 and 2 are the same movie as justice league but just in 2 parts. They have the exact same plot and the exact same characters. Except it wasn't DC copying, it was marvel. Lets look at the similarities.
All main DC hero's join together = All main Marvel hero's join together
Big bad Steppenwolf = Big Bad Thanks
Superman, a super powerful being arrives and saves the day = Captain marvel, a super powerful being arrives and saves the day
Batman was ready to sacrifice himself = Iron Man was ready to sacrifice himself
Batman and Superman become friends again = Iron man and Cap become friends again
Very similar right? It goes to show that what people tho k of marvel isn't always true and the same goes for DC. DC doesn't copy marvel movies, Marvel copies DC movies.
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The Marvel Problem
Non-FictionWe look at the problems with the MCU and Marvel Comics