well, i think venus (or character very similar to her) could be incorporated in the ninja turtle epic at some point.....
however, it is essential to remember that in the REAL turtle mythology, one of the big themes is the notion of isolation so much so that one can never really have a chance of perpetuating your 'kind' or of romantic involvement.... now, this may just be a stage in the characters' archetypal growth and such elements like venus could be incorporated later in.
now, the thing i DO have a problem with is not a fifth, female turtle.... that maybe feasible and acceptable at some point in the epic. no, i have a problem with venus' story itself. washed down the drain?? shinobi?? magic?? what the hell??? it has saban written all over it....
no, if we are gonna get venus or someone like her and put her in the tmnt epic than we need to radically rework her story. this 'shinobi' ("I'm not ninja, I am shinobi."
) bit ain't cuttin' it.....