1. Making a sequel of a plugin would be considered a derivative work as they're'd likely be some sort of continuity. This is why you don't see any other film studio running off to make a "Matrix" sequel (yes, I know one is coming.) It's obviously fine to continue the EV/EVO story line as by including a plugin architecture, Ambrosia tacitly implied consent. However taking the EV/EVO concept and moving it to another game might be... onerous without kissing andrew's pinky ring 
2. If you want a plugin that badly, learn to model in Mechinsto :rolleyes: and learn to develop a plugin in ResEdit.
------------------
My signature is short and unobtrusive. I don't have a long sig to overcompansate for "ego" problems.