This is what I can figure out about what will happen during Exodus chapters.
First, we have been told that two artifacts are holding Infinity. My best guess: Apex and Harvester are the locations of those artifacts.
While playing the last episode, I was able to take a look at the interior of the Forerunner structure during Science Mountain because one of the shields is not functioning. Judging by the size of the playable are that has been shown to us, the tunnels fight is going to be long, since we have to go all the way across it to reach the new area where the Lich is, at the other side of the tower.
We are likely going back to Warrens. During Lancer I saw there was an cave blocked with a shield door. I hope it opens to a large are for vehicle fights.
Where else do you think Crimson is going? I am just hoping for at least one new location.
Also, seeing as many are hoping for a vehicle run, would you like it to feature a Troop Hog, so all Crimson can go on one vehicle? We never were allowed to ride on the Troop Hog as long as I remember. I don’t remember if you could on ODST.