Sandbox

Sandbox is upcoming map that will be included in the Mythic Map Pack. It's name has lead many to think that it will be a similar map to Foundry. In certain Bungie.net forum posts, there have been repeated queries as to whether there will be a larger version of Foundry, and in some cases, Bungie staff or higher ranked members have replied and said that there was one in the works.

Skull
The crest of the hidden skull on this level appears to be a likeness of the monitor, furthering suspicions that this will be a forge-heavy map.


 * Skull Walkthrough (coming soon)

Trivia

 * This map is expected to be released with Assembly, Orbital, Citadel, Longshore, and Heretic in the Mythic Map Pack.
 * This map contains a hidden skull. Locating the skull earns the player the 'Sandbox Skull' achievement. The crest of the hidden skull on this level appears to be a likeness of the monitor, furthering suspicions that this will be a forge-heavy map.
 * It is highly speculated that this is the map featured in Bungie's acceptance videos.