I'm not going to read too much into the below info i took from the stream, because most of it seemed in Jest, but i thought i'd share because some of the stuff we have heard from rumours from various sources already.
Did anyone else catch the Costume contest?, the costume was "boba fett escapes the Sarlacc pit costume" and James Arnold Taylor (or was it dee?) said Just in time for his Spin Off movie, of course it was probably said in jest, but i'm hoping it's true.
And then there was Sam Witwers Tweet
Sam Witwer ‏@SamWitwer
Goal : play all Star Wars villains ever. You're next, Adam Driver.
But then
Sam Witwer ‏@SamWitwer
Guys, before you think I know something..? I don't. Assuming Adam Driver is this guy cuz #tall
#verytall
Again either all in fun or almost a slip up
Also whilst being interviewed, someone mentioned Episode 8 and the expression on Sams face (almost a knowing smirk) made me think he knows stuff about Episode 8 already or he is going to be in it. If he is, i'd like to see him as a new Character, obviously it has to be a Sith