worst fictional series to have a sburb session

topic as old as time. everyone wants to put blorbo from their things into a session and see how badly it would go.

question is what media would have the most catastrophically doomed, irrelevant, insufferable, annoying, or just plain stupid sessions possible

how bad would the tf2 session go, how bad would the SCP session go, how bad would the worm session go, just how terrible can it really get