Speaking with Siliconera at Tokyo Game Show, Yukio Futatsugi told them that Grounding is interested in developing Crimson Dragon RPGs (note the plural) if Crimson Dragon sells well:
When we asked Futatsugi what sort of games he would like Grounding to work on as the company matures, he replied, “If it sells well, we’d be interested in RPGs for Crimson Dragon, or even outside of the franchise. My personal interest is in smartphones. They’re gradually becoming capable of having visuals like this.”
Of course Crimson Dragon will need to sell well for one or more RPGs in the series to be developed, either on console or mobile, but it is nice to know that Grounding are thinking ahead. Panzer Dragoon Zwei complemented Panzer Dragoon Saga nicely because it was written with the expectation that Saga would follow; I imagine Crimson Dragon would complement a Crimson Dragon RPG in a similar way.