Now, I'm probably not going to play this game when it first comes out (if I do at all), but one thing I'm certainly not going to do is watch the whole fucking ending before playing it.
Fer fuck's sake.
I did exactly the same thing with XIII, I saw the ending and I didn't really know what happened because of the lack of context and at that moment I wasn't gonna buy the game but after the amount of shit the game received I got curious. I bought it, finished and then kinda regret paying so much money for it.
The ending actually makes a surprising amount of sense given the themes and events of the game.
This. A lot of stuff happens in that ending (I don't believe I've seen an ending this long since maybe Final Fantasy VIII), and is surprisingly good. Though reactions are gonna be mixed when people see it for various reasons.