Probably, I mean they need to find a way to integrate the Cubelets that will be useful to factions/Factions themed, without violating the EULA rules of Minecraft.
Also they would need to come up with a whole new type of factions system to fit CubeCraft which would take a while.
I'm up for that Idea but I just think the unique features that CubeCraft contains are only functional to minigames, or different types of gamemode that are more in the side of, 'different matches', rather than just 1 full match of trying to become the best Faction.
CCGN is more towards the minigames theme, not the 1 full game theme. Which is why it could be hard creating this, and (as mentioned above) integrating the unique features that makes CCGN, well, CGGN.