Hi,
So... I have a feeling Elijah's not really dead (forever š)... Here's what I think is gonna happen...
Once Katherine tells Damon & Elena everything about Stefan & Klaus' conversation, Damon & Elena will set out (along with everyone else) to try and find out where Klaus is keeping Elijah... It won't be easy but they'll do it... DE will remove the dagger from Elijah who will then remove the daggers from/somehow bring his family back... After which DE, the gang & Elijah & his family will all team up to end Klaus's life...
I have a feeling that Klauses family/his mother is the only one who are able to stop him (once they work together) which is why he "killed" them...
Any thoughts?