he's actually a character that goes back quite a ways in the Clone Wars animated series
Boba Fett and Cad Bane have a long history together , and was even kind of a mentor to Boba Fett when he was young
and if Cad Bane reminds you of someone from the old westerns , the inspiration to Cad Bane was Lee Van Cleef from The Good , The Band And The Ugly
Cad Bane was actually the one responsible for that dent in Boba Fetts helmet
as far as the biker chick and her friends , I have no clue , she's not in any of the animated shows or comics , she must be someone new that Robert Rodriguez came up with just for the show , but judging from social media , they didn't come across to well , just seemed so out of place with their shinny new bikes