Analysis of Cork-Based Networking - S5-E6
Trivia: Actress Paget Brewster appears in this episode as an IT lady named "Debra Chambers." Brewster was eventually cast as a different character during season six named "Frankie Dart." In one season six episode, the character Dart mentions being unable to get ahold of the school's IT worker- a very subtle joke in reference to the character she played a year prior.
Analysis of Cork-Based Networking - S5-E6
Trivia: The news ticket at the bottom of the screen briefly reads "Lavar Burton and non-celebrity captured by pirates in the Gulf of Mexico." This is a joke reference to the fact that in the previous episode, Troy left to go on a year-long sailing voyage alongside Lavar Burton. This is also the last hint the series gives to Troy's fate, as outside of some references, we never find out what happened to him or if he completed his voyage. (Creator Dan Harmon wanted Troy to come back in season six, but Troy's actor Donald Glover decided against it, feeling he had taken the character as far as he could).
App Development and Condiments - S5-E8
Trivia: The character "Koogler" is portrayed by Mitch Hurwitz, the creator of another beloved cult-sitcom, "Arrested Development." A year prior, "Community" creator Dan Harmon had appeared in season four of "Arrested Development" in a cameo role, and Hurwitz returned the favor.
Trivia: Troy's reference to Zach Braff being "ungrateful" for only appearing in the first few episodes of Season 9 of "Scrubs" is actually a cheeky inside reference to the fact that Troy's actor, Donald Glover, was only in the first five episodes of Season Five. Glover left the show because he had a number of side-projects he wanted to focus on, including his musical career and eventually creating the acclaimed series "Atlanta."
Trivia: When Chang is being chased by Professor Hickey, he screams out his same-sex celebrity crush is Nathan Fillion. Nathan Fillion would end up appearing in the next episode as Bob Waite.
Cooperative Polygraphy - S5-E4
Trivia: Pierce's boat that he gives Troy to sail the world in is called the "Childish Tycoon." Donald Glover, who plays Troy, uses the stage name "Childish Gambino" in his music career.
Cooperative Polygraphy - S5-E4
Trivia: This episode features a storyline involving the "Ass Crack Bandit", a student (or teacher) who is notorious on campus for dropping coins down the pants of students and faculty members. This entire storyline is a callback to the Season 2 episode "Intro to Political Science", in which the character Annie makes a brief passing reference to the "Ass Crack Bandit" during a speech.
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