In the Final Chapter, there are less then two thousand people remaining in the Earth. It seems to be a very small genetic database to produce healthy human beings (humans without hereditary diseases due to endogamy).
Cloning laboratories were destroyed by the "heroes" (if they can be considered heroes after killing innocent clones, including children).
Umbrella workers, members and its relatives, including children, were killed by "heroes" while in suspended animation.
Natural resources and fauna seem to be destroyed (like the infected crows and dogs) and new and dangerous species have appeared.
Even if the antidote was liberated in the final, what will remain to restart humanity? Will it be able to kill non human zombies?
To me it seems the "heroes" of the movies just want to shut down everything and wait for death.
Is it possible to restore humanity in the world after Resident Evil Final Chapter? And is this the objective of the "heroes"?