Yeah, knowing 3D realms they would probably do that. Unless it got Lost and is on some Guys desk. Just like what happened to Wanton Destruction.
That aside, They could have just released the 2001 build. It wouldnt have been too bad. It looked Like a Kickass game, it still looks cool even as I type this.
Edit:
Check out
This page
yes i know its in my signature, but its a pretty good source for information next to the 3D Realms site.