Forum:KB:Star Wars Shows: Canon with EU

Hi!!! I'm new to Wikia and not sure if this is the place to post this (please don't get mad if it isn't) but I have some questions regarding the overall status of Star Wars Canon. Previously I only had watched the movies and occasionally the clone wars but when news broke out about the sequel trilogy I learned about the Expanded Universe and got heavily into it. I understand that the sequel trilogy will not be following the previous post episode 6 stories but will be new original new ones (though some of the new actors cast for it look EU character familiar). I don't want to discuss theories but have some questions regarding the overall old canon and new. Disney and Lucas film said it would not be discarding the previous told stories but will be making a new canon universe with old elements and characters possibly showing up to become real canon with the 9 movies and the clone wars and rebels being immovable objects. After watching all six seasons of TCW and the premiere of Rebels I was wondering how this might apply to immovable objects in TCW that came from the EU. Mainly I noticed Quinlan Vos (a dark horse comics created character), the Dathomir Nightsisters (originally shown in The Courtship of Princess Leia), and the Mortis Monolith (which was mentioned in Legacy of the Force: Apocalypse) all appeared in that show. Since The Clone Wars show is T Canon and these elements appeared in it with the previous two originating in the Expanded Universe and the third mentioned in it are these part of the new made canon? I guess what I'm really asking is can someone explain in detail the overall canon of Star Wars? I've read a great deal of all Star Wars era books and comics since episode 7 announcement but after going online and researching I still don't understand what did happen in the Star Wars universe and what didn't happen.