I would back the Kickstarters/preorder/day-one purchase any of the following licenses for Mythras:
The Elder Scrolls
Fallout
The Black Company
Time of the Dark / The Walls of Air / The Armies of Daylight
Wool / Shift / Dust
Earthsea
Titus Groan / Gormenghast
That's probably enough for now. Of course, I'm such a Design Mechanism fanboy that I buy everything they put out anyway, so they won't lose my business if they ignore this entirely. But I live in hope! Let Design Mechanism become a big-leagues publishing house where they're vacuuming up licenses left and right and Pete and Loz sleep on a giant pile of blackjack, hookers, and blow! (/FuturamaJoke)