An open miniature game system for your own customisable races and armies would be cool, but again at skirmish level, akin the vor:the maelstrom rules. You could make your own armies of miniatures you want that licenses are too expensive for (like AVP) or create an army of terminators, or some other niche from a book or novel you like. Icannot believe how a suck ass company like wizkids got a license for AVP when mongoose did not.
On the subject of horror, add call of Cthulhu to the list.
With Chaosium in the state it is in., they may allow Cthulhu as a miniatures game. Hell, if you read into their material, and did stufff like when aliens fought wars over the planet, it would introduce some mad sh1t.
Stats to consider: Move, Strength, Vitality, Armour, damaage, melee attack, magic. Abilities and weapons could be built in.
Sorry to wobble of topic but I think this would rock, and that horrorclix stuff is not for me.
Lists: House of Ryleh (Cthulhu's cult), Nyarlathotep's cult, Tcho Tchos, Armies of the Elder Gods, the Outer Gods, etc. That could go on forever.
I hope someone from Mongoose reads this and addresses my follofwing point, as I am too shy to PM them about it: Could people submit test miniature game rules system or ideas to signs and portents?