WARNING THIS IS A TOPIC BOUND TO HAVE SPOILERS FOR H5G HALO ESCALATION HALO 4 AND THE OVERALL HALO SERIES! IF YOU ARE TO POST PLEASE USE LOGIC AND HALO REASONING TO SUPPORT IT
Now we know the description on h5 I can safely come up with a theroy. First mission will start with a cutscenes showing locke and possibly macerate getting there augmentations. Then go to a shot of them getting there armour and weapons before getting debriefed by hood/lasky/Palmer about chief and last known local. Then they will pick up arbiter and go to the ark. There the mission will begin with chief on the ark with blue team due to him taking them with him in escalation. Then you will fight through lots of flood and when I say lots I mean lots. Then we get to the teaser trailer thing. After that we move to locke. The the war Sphinx some how attracted the attention of jul mama and orderd his ships toned to the ark that’s where we see the cutscenes that were in halo 2 an. Then fight through covy and flood finally make it to chief where he has an ai chip and has transferred something on it lock asks what it is and chief refuses to awnser well… He just looks at him and says who are you and introduction’s. Then every body’s back together and then they return to infinity to aid in the efforts of defending the colonies. And then after that they resume the effort they had on the ark this time with every body. And some how we get a hint of cortana’s presence somewhere wether it’s the ark or somewhere else. Then they return to infinity due to a distress mayday from infinity, turns out flood are on multiple colonies. Then you fight fight fight. And then cortana contact chief telling him to brace then suddenly the sun rises and the flood is eliminated. The ending is where we we Schaefer looking at files aboard infinity, he learns about the Janus key and halseys betrayel and a psych report by lock on john. He learn that locke believes chief should be “contained in cryogenic sleep” for quite some time. Realizing he is being betrayed he leaves with him and blue team.
***cortana will not be revived in halo 5 for dramatic effect, you play as locke army chief and macer.