Hopefully a new Deus Ex game might be a possibility again.
The thing about Deus Ex is that there's nothing particularly special about the "IP". Anybody could make a near-future cyberpunk conspiracy-oriented immersive sim, and call it whatever. The modern Deus Ex games were really average, and (as detailed in the recent hbomberguy video) failed to grasp the key principles of level design that are required to make games like that work.
A lot of what made the original good was unraveling the conspiracy. That's a trick you can only do once, and I think in large, that's why the sequels (including IW) don't have the same impact.