If you're curious to see what kind of  controller layouts are available on the current demo build of Halo 5: Guardians, I had a chance to record the full menu at Microsoft's Gamescom Showcase.

We get Default, Southpaw, Boxer, Green Thumb, Bumper Jumper, Recon, Fishstick and Halo 4 for buttons, and Default, Southpaw, Legacy and Legacy Southpaw for sticks.

You can check the video out just below: