With 6x more propellant and 4x the power of today’s Dragon spacecraft, SpaceX was selected to design and develop the U.S. Deorbit Vehicle for a precise, controlled deorbit of the @Space_Station
Looks like there will be 30 draco engines on the back of that thing. Pretty Kerbal!
Edit:
https://www.youtube.com/live/Dw1JXZwo00o?t=34m48s (34:48) Seems to imply Falcon 9 is insufficient.