You know what a pessimist is? An informed optimist.
But people just hope in what they want to believe.
Interplay has no money. If they ever get enough to start game development (and the $75M they are looking for is a heck of a lot for a single game), a Descent sequel might rather not be their first choice, not even the second. Descent never was all that much of an economic success, despite it being a truly unique and innovative game.
Finally, from all I know the owner drove the company against the wall because he didn't listen to good advice, and you don't really know how much has changed there.
Experience tells me to be skeptical and wait for something substantial to be delivered. I truly wish there would be a professionally made Descent sequel, but you got to be realistic. All here who believe are free to pray for it to happen though. What do I say "free"? Just do it!
God is generous after all.