That's fantasy, not realism. If we go down to movies, a realistic movie would be a documentary. It shows you things as is. No room for fiction.
A fantasy movie would be a guy flying around and shooting lasers, even if it's based in "today's world". It's not being based on reality, hence being fantasy. Just go and google "Man of steel" or anything of sorts. What's the first word you see in its description? "Fantasy".
Cartoony is an artstyle, which is a stylized form of painting or drawing. As for realism: "Realism in the arts is the attempt to represent subject matter truthfully, without artificiality and avoiding artistic conventions, implausible, exotic and supernatural elements.".
So yeah, Injustice 2 has nothing to do with realism. Bring on Oil Tanker Bane.