Apparently the guys making the new Heavy Gear game, Stompy Bot, own the IP for Freespace as well: http://tsdr.uspto.gov/#caseNumber=85714760&caseType=SERIAL_NO&searchType=statusSearch

I doubt this means a new game, but that's kind of weird.

While it is possible Interplay sold the trademark given their financial situation - the mark says: So it's also possible the trademark will be revoked. Also this is trademark, not copyright.