Why no good TMNT fighting game?

[neatoman]

So TMNT would be a prime target to make fighting games out of, right? Martial arts themes, lot's visually memorable characters and plenty of et pieces for stages... So how come there has only been three TMNT fighting games and how come they all kind of suck?

The Snes version of Tournament Fighters comes the closest to being good but still has some problems with the gameplay, the other two are certainly weaker. Smash-Up is a slow Smash Bros clone that lacks much of what makes Smash Bros so fun, and a rather small roster for a game in 2009.

And then there's Mutant Melee, I'll let it speak for itself.


So yeah, why no good TMNT fighting games?