The following post is not a panicked overreaction, I am just idly speculating:
I'm wondering if the current showrunners experience with Happy Endings is a reason why the first episode, and maybe upcoming ones, will have more plotlines packed in compared to a "normal" episode of Community.
In Happy Endings, a three-storyline episode is common, as the six main character often pair off into their own crazy adventures, only to have them come together at the end (i.e. Alex and Max have a zany get rich quick scheme, Dave and Brad turn the sandwich truck into a little girl's teahouse and Penny and Jane start stalking Nathan Lane). That kind of story structure works because of the particular context in which Happy Endings exists, but I wonder if this kind of three-sleeved story will become the rule rather than the exception for Community, as the last episode basically had the characters pair off into separate storylines (Jeff + Pelton, Annie + Shirley, Troy + Britta and Abed + Pierce, kind of).
I don't think that formula will work as well with Community though, so I hope this doesn't become a recurring theme.