Ok even though I had initially had some doubts about this, all this positive feedback got me excited like Prometheus and I was planning to see it this weekend because I love time travel films until I read this from someone who saw it and it "confirms" what I said earlier about how can both exist at the same time. But what this person pointed out is even worst so if you seen it and care to hopefully explain it from this person legit big problem with the plot in the spoilers.Warning: Spoiler! (Click to show)
Not exactly. The movie was perfect up until the end where Young Joe kills himself. Then Old Joe ceases to exist. Based on THAT logic, Old Joe would have never existed period, which means that all of Old Joe's actions/history throughout the movie had never happened to begin with.
It's one thing if Old Joe went back in time and was sent to an alternate past; one like his but not THE past of HIS reality and all he could do was change the timeline of that reality. But they were selling it from the start that it is the same reality/timeline. Any injuries that happened to Young Joe showed up on the Old Joe because they were one and the same (Young Joe getting shot with the rock salt, carving the name of the waitress, etc.). If Old Joe was from an alternate future, those injuries would not show up. But they did, so they were hammering the point home that it was all the one and same reality.
And more importantly, when Young Joe committed suicide, the Old Joe would not disappear if he was from an alternate timeline. So based on both Joes being one and the same, if Young Joe killed himself, he would NEVER grow up/live to become the Old Joe who goes back in time. He killed himself, right? So how does Old Joe's actions happen to begin with if he killed himself 30 years prior?
THIS is why the movie sucked. It turned into a cop-out with the suicide and like I said, if he killed himself to make Old Joe cease to exist, he wouldn't be alive to become the Old Joe 30 years later to begin with. This MAJOR plothole could have been fixed if they went with something simple as "you can't go back in time into your own timeline" and wrote the story to reflect this.