When looking at the story of Lockout there are a few similarities to John Carpenter's Escape from New York, putting a badass convict onto an unwanted mission to rescue the president (or his daughter for that matter) from a future prison.
Now I see those similarities are largely superficial and only concern the story's concept on a very broad scale. But I remember that around the time of Lockout's release or a bit earlier there were some rumours about a remake of Escape from New York and this movie made me wonder if this might not even have been intended as that remake in the first place but was then reappropriated during its production. While the corresponding Wikipedia article says that said remake is still in development, it also suggests that it went through a significant deal of production bureaucracy and many different hands. So while I might just be imagining things here or drawing a connection where there isn't really one, asking can't hurt.
So, to which degree was the development of Lockout actually influenced by Escape from New York (if at all)? Is there any solid evidence or even secured information that it once started out as an actual remake but was later reappropriated? Were there any legal or bureaucratic intricacies involved? Or are the influences just on a less specific story-wise/artistic level? Or are those similarities entirely coincidental and I'm just grabbing some straw without reasonable basis?