Re: If VI had featured Saavik instead of Valeris as the traitor
Chekov as a co-conspirator? No motivation except for the false Piotr memory. Janice Rand would have been a logical choice, getting back at Kirk for kicking her off the ship all those years ago. And because he tried to do the nasty with her without consent.
Moe: I'll take the blonde!
Larry: I'll take the brunette!
Curly: I'll take the Black and Tan!
--Wee Wee Monsieur (1938)