Shirley Bennett: They remind me of Sam and Diane. I hated Sam and Diane.
Annie Edison: Who are Sam and Diane?
Shirley Bennett: All right, we get it. You're young.
Annie Edison: Let's get back to Britta and Jeff.
Jeff Winger: There is no Britta and Jeff!
Pierce Hawthorne: He said, fully erect.
Britta Perry: Oh my God, you've been hit!
Jeff Winger: What? Oh no! Wait, wait... It's blood. I thought it was paint but I'm just bleeding. Talk about luck!
Answer: The implication is that Jeff will still be teaching at Greendale after Annie and Abed leave. As for who became vice dean? It's never shown, since it's not really important to the series.
TedStixon