There's a fun parody of '70s cartoons in the current Teenage Mutant Ninja Turtles
animated series. Leonardo there is a huge fan of Space Heroes
, an old cartoon done in a dead-on, beautifully authentic recreation of Filmation's Star Trek
animation style -- although the show-within-the-show is far more violent than any Filmation or other '70s cartoon could ever have gotten away with being.