Tomorrow War is a movie about a war in the future where the future has lost and are hoping the past can help them. In the final scene of the movie, we see what appears to be the last holdout of humanity in the Bahamas. The last vestiges of their future tech are there, mostly hover drones that do a good job securing the perimeter. The flags of every surviving nation on Earth are there. And the main char talks to future soldiers there. We the audience learn that even they no longer hold out hope of survival. The world is lost, the young have certainly already been sent back, and those stuck in the future will die. There is nothing anyone can do about it. It is a sobering moment that underscores just how bad the future has been hammered. But there is actually one hope. Which is why the main char is there.