Embracer bought lots of things, not just Deus Ex. Companies acquire IPs in bulk buys all the time that they never do anything with (Gex being a good example).

That said the linked article says that Eidos Montreal is working on a Deus Ex game, so you might be in luck.

Embracer is particularly known for picking up old IP's for reviving them though, especially when there is demand for it.

They released a new expansion to Titan Quest last year. I’ve talked to their leadership and they will 100% release content and new platform support for every IP they buy. It’s their whole MO - buy somewhat stale IP and take care of it to generate easy revenue. For almost every big IP they buy they fund a sequel