OMG It looks awesome
99.9% sure that this is fake.
The Pious Inquisitor was destroyed in 2553, and Guardians is set at least in late 2557 (though, I suspect it’ll be around March 2558).
The image of the first mission is literally just a shot of Cortana from Forward unto Dawn superimposed over a shot of John from Halo 4’s prologue scene.
The armour in the top right is Venator, an exact shot from a profile shot in Halo 4 - the patterns, colours, and textures are exactly the same.
I’m pretty sure that Halo 5: Guardians will have more than just campaign and multiplayer too - be it Spartan Ops, a new iteration of Firefight, both, or something else entirely.
Also, the images in the map selection screen are concept pieces from the H2A maps in the Master Chief Collection.
SO yeah, it looks really pretty, but it’s almost definitely fake.
The Pious Inquisitor part is real. Its been established that Midship will be remade and that the new map for the H5 beta takes place on Pious.