Flames of Vengeance (FAQ) is an upcoming add-on (German version released already) for the game Ego Draconis. If you keep a save from near the end of the main game you can keep going with the same character from D2:ED straight into FoV and continue/conclude the story of the dragon knight. Alternately, you will be able to start a new (level 35) character at the beginning of FoV.

There will also be a release combining a remastered version of D2:ED with FoV, called Dragon Knight Saga. DKS will be released on PC and Xbox; there will be a stand-alone release of FoV on PC, but it is too large for DLC on Xbox.