Board Thread:General Discussion/@comment-9830601-20130617150055/@comment-6881629-20130619105259

Delphine should have the dialog option to start Rebuilding the Blades after finding Sky Haven. You say your Esbern is buggy so it may not help and also from the wiki page -

"You can complete this quest without actually having it. Recruiting 3 followers is, hence, unnecessary. Complete Alduin's wall, kill the dragon. A new miscellaneous objective will tell you to return to Esbern. However, he might not actually have any dialogue options about this objective. This could be due to Paarthurnax still being alive."

I did the quest in order and it was still really bugged i didn't and would never kill Paarthurnax though.