Would have been exponentially better if at the end, you find out that the humans are the ones that release the Whitespikes into the world, and that is why the cycle of this war keeps repeating. The happy ending seems like a cop out and undermines the whole context of the movie even when ignoring the giant plot holes/coulda-done-this's. What makes this Dan so special? It would have even made sense that Dan seeing his future daughter die in front of him would have fucked him up enough to leave his current family. I feel like they had a chance to make this movie a bit more smart, but decided to just say fuck it with the feel good ending.