Halo - Side stories?

Ahoi!

Apart from the main series we now have a few other titles that cover other lore and stories of the Halo Universe (Halo Wars, Reach and ODST to name a few). Which other stories would you like to get told through a game?

Right now I feel that a game covering some stories of Team Gray would be awesome. I quote:

“Gray Team is a group of SPARTAN-II commandos of the UNSC Naval Special Warfare Group. It consists of Adriana-111, Jai-006, and Mike-120, the most independent and individualistic of the SPARTAN-IIs. These qualities were used to create a unit trained to operate for extended periods with minimal supervision and support. Their Mark IV MJOLNIR Powered Assault Armor is likewise colored gray.
Compared to the other SPARTAN-IIs, such as the conceptually similar Black Team, Gray Team’s training placed additional emphasis on individual thought and action. This made them suitable to execute and survive covert missions deep behind enemy lines with no support from friendly units. Their assignments focused on disruption of enemy operations followed by a stealthy extraction” (Halopedia)

I imagine the game being non-linear and perhaps more of an open world take. I think their backstories could really create a Halo experience unlike the rest of the games!

Other than that it would be interesting to play some prequel taking place during the forerunner era. Lots of potential for a great story being told there too!

What would you like to see in a new side-title?

A think a prequel game, or even a game consisting with flashbacks every know and then would be great for story. Perhaps it could shed some light on other events and characters in the Halo universe that have only been mentioned briefly or not mentioned at all in the games.

I personally think a game on Grey Team would be neat.