As some sort of twisted alternate-universe Bruce Forscythe who got into game development would say, sequels mean features. In the case of Deus Ex: Mankind Divided, that means a New Game+ mode for the upcoming shooter-RPG hybrid, along with a set of further additions detailed in a new developer diary's Q&A segment.
The video, part of Eidos Montreal's DXTV series, highlights the happenings at Gamescom:
Some extra cool stuff in here, particularly the even more modifiable UI and focus on player choice when it comes to combat. I always found it funny that Human Revolution managed to push too far in the opposite direction of other games, giving too many benefits to a stealthy, pacifist player, making that a far superior and easier playstyle. I do enjoy having options in games, but sometimes folk just need killin'. Joel went into more detail about these changes last week.
The elements they're talking about being able to remove are those that take away from the realism of the game, which more hardcore players like to take out to create a better stealth experience. Deus Ex is a lot of things to a lot of people and manages to straddle the line of one-shot stealth game, fun FPS and full-on-RPG quite well.