343i has been trying new things out, trying to make the Halo series stay alive, and this is my opinion which would make Halo 6 the best Halo game if they added back to the game from the old games and innovative ideas. If you like the idea and would like to elaborate onto it, feel free.
Things to bring back.
From Reach:
-Forge World
- The Ranking and Credit System
- Purchasing armor pieces and attachments
- Emblem customization
- Getting the choice to be a Spartan or Elite in multiplayer.
- Custom Games diversity.
- The Revenant and the Falcon
From Halo 3: - Weapons like the Mauler, Bruteshot, Flamethrower, Incendiary grenades, and spike grenades.
- Brutes
- Three colors on the armor (Armor Primary, Armor Secondary, and Armor Detail)
- Duel Wielding