Canon: After The Wizarding War, Neville becomes Herbology Teacher. Theory: He doesn't want any students to become Overstimulated, so he takes lots of breaks and gives students Chocolate every 10 minutes. He goes to St. Mungos to turn The Closed Ward into a Place of Healing, and not a place to just put the patients. as he's walking the ward, he hears a Woman's Voice he hasn't heard since he was 1. "Neville?"
After writing this I started crying.