I mean, they know the series prints them money. AIR? Even if they "ended" the franchise's main story, the universe is so large now, they could expand the lore well into the future. Because how would it really be finished, with no going back? Every game basically gets a new pathogen, new protagonist, or villain, or whatever. Capcom really just has to change what letter the new virus comes under in the alphabet. https://twistedvoxel.com/resident-evil-10-year-plan/