Definitely more "own" themes. As has been stated by several folks, I find the licensed sets drive prices way too high for an already expensive product. They rely on far too many stickers/decals (I find this ruins the pieces for MOCs, but hey, the stickers come off easily enough if you never want to use them again). Also, they seem to use quite a number of custom parts that wouldn't be terribly useful for anything else.
I'd love to see more "own" space-themes, akin to the really good classic (circa 1987+ sets) space themes from about Blacktron I to Unitron (yes, some sets in the twilight of that era were pretty bad). Whether they re-visit those themes (like they're doing with Space Police III) or create new themes, I'm all for it. Though I would absolutely LOVE to see a Blacktron III line, returning to their original Black and Yellow colour scheme (and with cockpits that actually fully enclose a minifig, and don't need to be removed to place them in/take them out like so many of today's sets).
Ah wishful thinking...
