@promptingskenekidz definitely Adam and Thevan studying, Evan and Lena's pizza date, how Griffen met Thevan and Anika, Griffen and Caroline meeting for lunch during college, how Griffen feels finding out Caroline and Leon are taking over the academy.
But my #1 prompt (if you want obvi) would be of a whole reunion thing. Like Caroline and Leon maybe invited Kaz's group, Beckett's group, Jin's group, and Griffen's group (including Thevan and Anika) to their house for like a reunion/celebration thing after they take over the academy.
btw, you're books are amazing and you're one of my all-time favorite authors.