User blog comment:Arcaedia/Deus Ex: Mankind Divided announced/@comment-24.173.194.19-20150419172151/@comment-3418306-20150419193511

It's still up for debate as there has been no official announcement from the devs, but we can certainly still analyze, theorize, and debate. To recap, there are a total of four possible endings for DX:HR. The broad strokes from the video:

1) We don't see or hear from Darrow, Taggart, or Sarif ...and the game's plot presumably starts much like the trailer - Jensen adrift in a large body of water. This seems to reinforce the '4th ending', but there could be any number of reasons why Jensen ends up adrift somwhere, and the idea that it takes place at the start of the game's plot is mere implication and my own speculation...a better question might be why he doesn't sink.

2) There appears to be some civil unrest, particularly against augmented individuals, where at least one of the main antagonists seems to be the leader of an augmented extremist group. This is certainly possible with any of the endings, but casts the most doubt on Sarif's and reinforces Darrow's ending.

3) The Illuminati is still alive and well. Again, certainly possible with any storyline, but casts the most doubt on Darrow's and reinforces Taggart's ending...but the trailer also illustrates Jensen's animosity towards the group, so maybe not Taggart's ending?

So...as I said, this is all speculation, likely putting way too much thought into a teaser trailer, but it does seem clear that in the end we can't possibly know for sure which ending they chose as of now. They could certainly be pulling a little from each ending (much like they did for Invisible War with DX1), but I hope not...kinda cheapens the initial choice, as it wouldn't particularly matter anymore.