The one consideration on the part of Paradox is that a revamp of CK2 > CK3 should pay off fairly quickly, as it appeals to a broader base of support than V2 and has a lot of immediate recognition from strategy gamers. V3 will probably sell well in the long run, as the die-hard adherents to more historical simulations will very likely show almost fanatical support over time (when you've only a couple couple of choices, you support them fanatically), but it won't be the quick shot of cash that a mass-market game would provide.
Basically, we're talking about two decent sellers, one that makes its money up front and the other that generates nearly as much or more, but does so more gradually over the long term. After Imperator, they may have opted for the quick shot of cash.
The other consideration is that a mass-market targeted remake of the Victoria series would very likely drive away the players that it's supposed to satisfy, while not capturing nearly as much of the popular market as a Dark Ages or WWII game tends to draw by its very nature.
