Official footage released by Capcom in 2015 shows that the core story and settings remained mostly consistent between the N64 version and the final GameCube release.
It proves that the cancellation was not due to technical impossibility, but rather a strategic business decision. Capcom saw the N64’s user base shrinking and the GameCube on the horizon. They chose to pivot, not because they couldn’t finish, but because they wanted a better showcase for their new partnership with Nintendo. resident evil 0 n64 prototype rom 2021