Ending of a Trilogy, Better to End now so Halo doesn't take a Bad Turn
Halo's Finale....best to be ending now on a high note. Extending the Halo trilogy was considered, but did not prevail. Bungie's writers thought about it since the ending of Halo 3 left an opening for an extension, but in the end the idea didn't make it past pre-production. Bungie's Brian Jarrard explains it wasn't in their best interest to continue...