I laughed at that. :-) I envisage a: 360 degree, insta-kill, area of effect damage that extends to the full extent of their visual range.

Halo

• In the Library Sparky explains that the Flood are stored on the rings because the rings kill by piggy-backing off the Gravemind telepathic comms/control system to send a telepathic pulse that kills all sentients.

h2

• the Heretics are Hunters and we see new varieties
• Humans and Forerunners are the same species and Truth worries that the rest of the Covenant will find out
• the Phrophets have no homeworld and live in slipspace capable habitats
• the loss of their homeworld has reduced their population to unsustainable levels
• Truth's plan is to get his people to the Ark and fire the rings to kill off the other species, then use the Forerunner reseeding tech to restore his people and put San Shayuum on every home world.

Halo3/ODST

• How about changing Halo 3 so that Virgil actually does provide useful intel in ODST.
• And have actual rain
• have Virgil provide the clue to Buck that Dare is in the datacenter

Reach

• Rewrite
• lets see more of Buck and his old team