I was not thinking at segments, but at mini maps.
Let’s say that a mini map would be a sort of zone. It would be always the same. However, what would change is that you could have to go through this zone by walking from the lift entry to the room with 2 doors, or, if the mini map you have just completed ended with a room with 2 doors, you would have to go from the room with 2 doors to the lift.
After this you would then (considering you had walked to the lift) have a mini map that would start with a lift entry. and so on.
So, zones that would be linked by the lifts and rooms to create a random combination. And something that would be the surprise would be the conditions. By example you could start with a mini map where there was nothing particular. It start in the dust lands. You take a lift to the second zone that is under the surface. Here you encounter a power supply malfunction and are in the sewers. You reach the rooms of separation. Then you access a map with again nothing particular. Here you are in the streets and have to recover a cypher ident to progress through the mission. Then the final map. To access it you have to use your cypher ident… On this map, unlucky you are, the high intensity condition applies. Also, this is a map with a boss. So, your mission is an assassination mission.
As the game would generate the map when you all click ok (generation should start during the cooldown), when in the valkyrie you would be informed that you are sent on an assassination.
So, in fact, the missions would be generated from mini maps that would be used as tiles. Every time, 4 tiles. Beginning - 1st section - 2nd section - Final