If you pre-order the Xbox One version of the new Doom, you get Doom 1 and Doom 2. So says the Xbox Store.
Doom 1 and Doom 2 are already playable on Xbox One via the Backward Compatibility feature.
According to the game description, if you pre-order the new Doom the codes will be delivered to your Xbox message center in 7-10 days.
If you pre-order you also get the Demon Multiplayer Pack, which includes one unique Demon-themed armour set with three skin variations, six Hack Modules (one-use consumable perks - for more on those check out our Doom story from yesterday), six exclusive metallic paint colours, and three id logo patterns that can be applied to weapons and armour.