How about a new Space Hulk Board Game along the lines of the "Revised Red November" release? What about including a nice large board, new tokens, little miniatures (15mm / 20mm), and so on? Or, even something along the lines of "Advanced Space Crusade" but with FFG's amazing treatment?
With the GW version out of print, why not release a scaled-down version of this? Or, a scaled-up version of "Death Angel"!