One of two multiplayer maps revealed in the ViDoc, this one distinctively Forerunner. The map itself is supposed to be a facility for generating an artificial sun, hence the bright lighting.
Note the tall structure with the partial circle. It looks similar to the one seen on Breakneck, the revised Headlong Multiplayer map from Reach.
Here are the screenshots:
Note the red “up” arrow in two of the shots. Not sure if it’s necessary with an enemy immediately in front of you. I wonder if this can be achieved through radar instead. The arrow may be distracting. Here’s hoping for a Beta to check that out more.