The next Halo should have a campaign which you can do anything to you want to do the objective. For example, you could call in assistance or you could go in building and snipe covenant. Also, you breach doors. In addition, you could also call in an airstrikes, like in the Halo Combat Evolved Anniversary firefight. Speaking of Firefight we need that to come back, and when you are an Eliot in firefight it is the opposite way the humans come in pelicans and you have to try to survive. Now multiplayer should have more vehicle friendly maps like a one with 2 pelicans and both teams can fight with them. Also, the amount of people playing in one game should be broad, such as slayer should be like 18 people in one game. And in big team slayer they should have 36 people in one game. In addition, the maps should also be huge like the size of entire city. For example, you could have New Phoenix from Halo 4 while it was getting destroyed by the Didact. So now you have buildings falling, and people being evaporated during the game.Last but not least, Spartion Ops should stay.