What? Why?
Superman, Batman, and Wonder Woman are too well known. Leave them out of the movies, tv, web episodes for 30 years so the other characters can catch up too speed with public knowledge.
A loose pattern? (Results may be rigged and badly researched.)
Adventures of Superman 1952
Batman 1966 (Adam West)
Wonder Woman 1976 (Lynda Carter)
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Superman 1978
Batman 1989
Wonder Woman ----
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Batman: The Animated Series 1992
Lois and Clark: The New Adventures of Superman 1993
Wonder Woman -----
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Smallville 2001
Birds of Prey 2002
Wonder Woman ----
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Batman Begins 2005
Superman Returns 2006
Wonder Woman maybe not sure 2009?
Does anyone see Green Lantern 1967? Nightwing 1994? Deadshot 2006?
Just Supes, Bats and maybe 2Ws repeating. They start with the 3 then kinda work on the other Supers. This loose pattern should stop (opinion).
Bring in the unknowns! Break the cycle!