Popeye (and I speak as a long-term Popeye owner) - could have been really amazing. If they had just stuck with Classic 1940s-era Popeye, using all of the weird stuff from the old show, and maybe even taken the bold step of doing the entire machine in Black & White. This bizarre modernized eco-warrior Popeye. Feh. (I still like to play the game)
The Flintstones - same argument. Should have ignored the hideous, un-funny movie with Rosie O'donnell et al and just went 100% with the old 1960's cartoon. There are like a million classic lines and situations from the old show, and it would have been a timeless theme, not tied to the turd of a movie, but tying in with the movie's release.
Gilligan's Island. This is a beloved show, many awesome episodes (cheesy, but awesome) and how could they have fucked it into a cocked hat? Yet, they did. The bad cartoony art, the lackluster gameplay, weird shot layout - I HATE this game. It could have been sooooo much fun. Should have used art and photos right from the show, callouts from show dialog, and have the modes based on the best classic episodes; the Wizard Mode - Escape From The Island. Collect all of the Castaways, collect all of the raft parts, build the raft, avoid sharks, bad weather, and Russian Cosmonauts.
RussMyers