Marvel is just a copy cat

Apparently everybody are drooling over Marvel because the success of their recent superhero movies but its appropriate to remind you people from who they are stealing their "unique" ideas.

So heres a couple of examples. 

Deathstroke first appearance 1980
Deadpool first appearance 1991

Dr. Fate first appearance 1940.
Dr. Strange first appearance 1963.

Darkseid 1970
Thanos 1973

The Atom 1961
Ant-man 1962

Justice League 1960  (and Justice Society of America in 1940!!!!)
Avengers 1963


Smell a pattern here...?