Trivia: The scene with Jill eating Wesker's sandwich and saying "It's Jill's sandwich now!" (although saying it quickly in such a way that you can't hear the "s" and it sounds more like "It's Jill sandwich now!") is a reference to an infamous moment in the original video game. In the game, Jill is almost crushed by a booby-trap, and the character Barry says she was "almost a Jill sandwich!" The poor dialogue and terrible delivery by the voice actor ended up making the moment a meme many years later.
Trivia: This reboot was announced while the last film in the original film series - "Resident Evil: The Final Chapter" - was still in theaters.
Trivia: Was originally set to be produced by James Wan, but he left the project to produce the 2021 film "Mortal Kombat" - another reboot of a popular video-game-to-movie adaptation.
Trivia: At one point in the film Jill Valentine asks her teammates whether they would rather be eaten by a giant snake or a shark. This is a reference to the original Resident Evil video game were the player has to battle a giant snake called Yawn and a mutated shark called Neptune. Neither of these creatures made it into the film.
Answer: He is talking about the Umbrella corporation stealing his work, specifically, the G-Virus, so they can weaponize the virus. If the process goes well, Umbrella will take credit for it, but if the process goes poorly, Umbrella will blame Birkin for the failure, either way, Birkin loses.