Earlier quoted context omitted.
I think Deus Ex is done. A finish to the Jensen story would rely upon Eidos Montreal being able to produce more than one game every 5 years. Since Mankind Divided, they've released only a Guardians of the Galaxy game. MD was a great game, which was according to Eidos Montreal kneecapped by "Square rushing it out". Human Revolution was an even greater game, but still slightly kneecapped by "Square rushing it out".
Why would Embracer buy Deus Ex if they had no intention of doing anything with it? They're not EA.
That said the linked article says that Eidos Montreal is working on a Deus Ex game, so you might be in luck.