► There will be ample opportunity for some characters from TVD and The Originals to move between shows on occasion.
► Katherine will be a significant part of this season, just as she was in Season 2.
► Bonnie will remain a series regular, however as a ghost. As far as we know, only Jeremy will be able to interact with her, as he is a medium.
AND I heard that Rose is coming back... But don't know if it's true!