Both Ubisoft and Activision-Blizzard are in serious economical and legal problems from which they might not recover, in a perfect world they'll have to sell some of their studios and properties just like how Square-Enix sold their western studios and IPs, and therefore, we'll have a chance of seeing them all again.
Now, if we could figure out who owns Gex.

Imagine Gex 4 comes out and instantly sells 15 million copies like the OG trilogy did. Square would realize the massive mistake they made.