(click to embiggen)
What we gather from the Sandbox screenshot is that the map looks a lot like Halo 3 arena Sandtrap, but darker and with fewer hills. If you look really close, each chunk of the map seems movable, meaning that Sandbox will be a true Forge experience. And if you investigate even further, the Austrian Xbox Blog mentions the Mythic maps will cost 800 with
Update: Microsoft just informed us that the Mythic Map Pack will be available bundled with Halo Wars CE on March 3rd and will release as a stand alone XBLM download later this Spring.
[Via 1UP, Thanks MDK x2002x]