After watching the video multiple times,
1. People are reading too much into the tents with the colored flags, imagine the tents are pits, no two are the same and all have different colors.
2. The map looks mirrored (somewhat), with a obstacle on each half (placement about like the scoring platform of recycle rush) and a major obstacle in the center, which resembles a "figure 8".
My best guess of something fun is, of course "Capture the Flag", however with a "twist". To get to the opposite side of the field, or return, you have to drive the "Figure 8" (enter in the middle, do a full 8 and exit the middle.
Imagine the collisions! Or better yet. after running half of the 8 you have to pass the flag off to an alliance partner to complete the 8 and return to your half for scoring.
We all know there are many things that can happen from the multiple
possible hints given in the video.
Who knows, maybe the GDC is reading this and many other forums for hints on how to alter their plans for the game. There's still plenty of time to change the game and cut the release video. Be careful what you guess it might come true.
Have Fun and Good Luck