Versions of Elite Dangerous can only be bought in bundles with two options currently:
Anything with 'Edition' in the name is a Bundle. All editions get the "Elite Dangerous Core". This does not grant game access, but does contain the files required by all versions of the game and needs to be installed.
Elite Dangerous: Arena Edition (No Longer Available)
This edition comes with Arena, but it does not include Elite Dangerous (No Elite Dangerous content, but it will include any Arena updates).
Elite Dangerous: Standard Edition
This edition includes both Arena and the full version of Elite Dangerous version 1.x (No Horizons 2.x content, but will include any updates to the base game).
Elite Dangerous: Commander Deluxe Edition
The Elite Dangerous: Commander Deluxe Edition is a bundle that includes Elite Dangerous: Arena, Elite: Dangerous, Elite Dangerous: Horizons, the Elite Dangerous Core and the Commander Pack (18 paint jobs).
Elite Dangerous: Horizons Season Pass
Elite Dangerous is required in order to use the Elite Dangerous: Horizons Season Pass. This gives existing Elite Dangerous owners access to Horizons content.
Elite Dangerous: Horizons Extra Edition
Elite Dangerous is required in order to use the Elite Dangerous: Horizon Extra Edition. This gives existing Elite Dangerous owners access to Horizons content with an additional 1500 Frontier Points.
Elite Dangerous: Commander Pack
The Elite Dangerous: Commander Pack contains a selection of 18 paint jobs for you to begin customizing the appearance of your ship in Elite Dangerous.
You can see a full list of the games here: https://store.xbox.com/en-US/Xbox-One/StoreSearch?query=Frontier%20Developments%20Plc&ProductType=Games
If you have any particular queries surrounding the different versions of the game, please contact our Support Team via the button below.