The Tomorrow War's successful "aliens vs humans" story proves that the Alien franchise can finally bring the Xenomorph to earth for a full-on war. https://screenrant.com/tomorrow-war-movie-alien-war-earth-concept
https://www.avclub.com/if-aliens-attacked-sam-richardson-would-probably-pee
https://www.joblo.com/movie-trailers/the-tomorrow-war-clip-dan-gets-blasted-into-the-future-2021-chris-pratt This is what one could call very messy time+travel.
The Tomorrow War Ending Explained | Full Movie Breakdown, How Time Travel Works And Spoiler Review. https://www.youtube.com/watch?v=UA1HZsN-Z8M
Of course Edge_of_Tomorrow is also a time travel war movie. In some ways its still better than, The Tomorrow War but everyone has their preferences. When you realize that you have gone a little ways back into a recording, you just might have a tendency to do some editing.
The concept of a war that was started offworld can make for interesting Sci-Fi stories. However, earth based wars are a continual concern and issue throughout history.
https://thedigitallabyrinth.blogspot.com/search?q=time+travel
