It begins with the letters (for example) “May 15, 2558” then “Location Unknown”… And it’s in a huge rocky desert, with the sun setting (almost night) and the planet from the e3 trailer in the background. Then you hear a noise of an approaching vehicle, and the scene pops over to a warthog speeding through the desert, in the background behind it, a spectre and two ghosts chasing it.
In the warthog, there is two figures, one of them master chief on the machine gun with a mysterious figure driving the hog. The chief shooting at the vehicles behind him, destroys the spectre, which rolls off the road and blows up. Then he destroys the remaining ghosts, right as they pull up to a huge cliff with a big forerunner looking door in it. The hog pulls up and chief jumps out, the figure driving gets out too, now it’s night. As they walk up to it, the door starts opening, inside a long hallway with lights glowing out of the walls, chief says “is it here?”, and the figure says, and you can tell it’s an elite from the voice “the rebels tell the truth, reclaimer.” As the door finishes opening, the lights get brighter, light floods over the mysterious being, revealing the arbiter. As the chief and arbiter walk in, the lights shut off, and you can hear a scary, growling noise, a deformed figure can be seen approaching in the darkness (hint hint, a flood zombie), arbiter throws up a plasma rifle and kills it.
Then you can see a horde of the zombies mobbing up in the darkness, then all of a sudden, in a flash of light, a bunch of sentinels start shooting at the zombies (in the trailer you can’t tell they’re the flood cause they’re not shown directly), when they’re all dead, a door down the huge forerunner hall opens, light shining from it reveals the didact’s figure, and right before the screen goes dark, his helmets eyes flash orange.
Then the screen goes dark, and the phrase “the legend continues” comes on screen, and then it switches over to the halo 5 symbol. 