Dream chaser seems to be built with significant engine thrust and has room for additional engines. Currently they have one engine per side but renderings have been shown with a 3 engines per side. Considering the Dream Chaser spaceplane gets launched all the way to orbit it should only need manuevering engines like the Boeing and SpaceX capsules.
This points to Dream Chaser potentially being designed for a more reusable launch system in the future. Potentially similar to the original space shuttle or a fully reusable system.
The first stage shuttle option.
For instance two Rocket Lab Electron lower stage rockets acting as boosters with a central disposable fuel tank to provide fuel to the Dream Chasers inbuilt engines. The Dream Chaser is 25% the length and size of the Shuttle. 0.25 x 0.25 x 0.25 equals 0.015625. A 25% scale Space Shuttle then requires 1.6% of the thrust. An electron lower stage has exactly 1.6% of the thrust of a space shuttle booster. A very big coincidence.
Dream Chaser would then need an external fuel tank with around 20,000kg of fuel. It would only need around 200kn of total engine thrust to have a similar thrust to weight ratio of the space shuttle. The triple pack shown in the rendering has the required thrust. Another very big coincidence.
The second Falcon 9 option.
Dream Chaser has significant propellant capacity. I estimate between 3,000kg and 4,000kg of propellant and this would provide between 2000ms and 3000ms of Delta V. Hypothetical speaking Dream Chaser could be placed directly ontop of the first stage of a Falcon 9 booster. Dream Chaser is approximately 7-8% of the weight of the Falcon 9 upper stage plus the payload. The booster would be able to launch it up much higher and faster to around 14,000km/h instead of 8,000 km/h. This means Dream Chaser needs significantly less Delta V than the Falcon 9 upper stage to reach orbit. The problem here is the Falcon 9 lower stage booster would be re-entering the atmosphere much faster and hotter. It would require a longer re-entry burn. The numbers are very close. The big trade off is that Dream Chaser would be able to lift less than 10% of the payload to LEO of a normal Falcon 9. But it is 100% reusable.
The third air launched option.
Stratolaunch can lift 250,000kg. Place another larger winged rocket plane behind Dream Chaser to act as a booster. The larger rocket plane takes it up between 14,000km/h. This rocket plane won't need heat tiles at this speed. You now have a 3 stage runway launch and runway landing system.