I'm not even sure who owns them, but there are several companies who have published new versions of some GDW boardgames - HMS have the Europa series, still I think, and as you say Avalanche published a new edition of Imperium.This just reminds me how many of GDW's board games deserve modernized reprints. Steve Jackson already tackled Triplanetary (which partly inspired his own Star Fist design) and Imperium has had at least one new (and rather divisive) edition from Avalanche, but there are others that would probably do well either as nostalgia buys or simply on their own strengths. Still holding out hope for a modern Asteroid, for ex.