Since the old Fire Emblem Switch Leaks thread probably won't be used much anymore, I'm starting a Wild Mass Guessing thread for Three Houses.
Here are mine to start with:
Dimitri's kingdom invades Edelguard's at some point
The teacher is connected to the villains
LOVE TRIANGLE (for who gets Claude)
Roster will consist of about 40 characters. My exact guess is 37, not including DLC.