in this game section http://www.speedrun.com/arkhamknight new game+ means main story only or main story and side missions? and 100% means what? im confused.

This would be a question for the B:AK forums, and not here in the general talk forums.

well bak forums are kinda empty. if you know anything let me know.

The forums are empty yes, however the moderators are active and can answer your game/catagory questions over there better than us, who don't run/know the game.

http://www.speedrun.com/arkhamknight/thread/zspof

It just seems like Any% NG+. But just message Feanorus about it, he was just on less than a half hour ago and moderates that game.