I've been working on a level pack (on and off) for the past ten years. I prefer to call it Final ROTT.
I gave up on the ambitious goal of a 99 level .rtl file, and will simply be following the template of the original darkwar.rtl. There will, however, be a LOT of Comm-Bat levels.
I'm working on a trailer I intend on uploading to YouTube.
Here's a thread I posted a while ago that's just the tip of the iceberg:
http://forums.3drealms.com/vb/showthread.php?t=34240