I don't think it looks influenced within Inception at all, tbh. I think it's perfectly plausible to take the original game and perceive of a future where people could relive Desmond's life without knowing about Inception. It's quite a simple extension.
Well you have to bear in mind how memory playback works; you can't just start with the event, you have to work up. In this instance the event would be the Abstergo satellite, which it's easy to think of would have far enough reaching consequences that someone might want to go back and look (or Templars would want to see where they went wrong
). The Lucy thing that I was talking about would be worked into that story - Desmond has to find his Eve, but first she had to be awoken (killed then resurrected). It's just that after the killing part Desmond's son wouldn't be able to have been born until she was resurrected, hence the paradox.
I thought "those who came before" pretty much were gods? They had humans as slaves, after all.
Eden may well not be heaven, but I think it is what christianity perceives to be heaven. An unspoilt utopia. If Desmond has to travel there to find his Eve I would think it has to include present-day people.
I can't imagine the assassins would be too happy to see Desmond stab someone very important, also you don't hear anything from Shaun or Rebecca which I think you would if it was 2012. Also, they say "get him back
in the animus", which to me implies he was just in it.