The actual vehicle as seen in the leaked pic, had control surfaces both lifting surface & angled stabiliser , basically it is also like the RLV-TD a space plane. Whatever way you wanna fly, the mode is similar. either powered or unpowered glide. For powered you need an engine like scramjet/RDW Engine fitted inside, full launch vehicle still needs to get boosted to higher altitude for this. So next you want a reusable booster preferably.
This booster can be made in many way. For a glide vehicle use you need very high initial acceleration so the lift generation is so high it can make the vehicle travel a long way without losing altitude first & also need light L/D design airframe.
With engine based powered solution, booster only need to provide enough acceleration so scramjet can ignite. So initial acceleration demand can be much less.
For nuke delivery role it needs to be highly optimised. Rest it is up to you to include features as you can develop.