A few months ago, there were rarity changes to clocktower prison, eternal dread, dread servant, and d-counter. And they also found the phoenix enforcers along with alternate artwork versions of avian and burstinatrix to look like Aster's in the files. So they may be trying to plan an event or box cards for it. The problem with an event is that they probably don't even want to make one too "fun".
Unless they either increase lp or possibly where the game gets to a point where it is almost impossible to get it out on time, I can't see them giving us dragoon. The Weevil skill and lava golems seem to have made Konami shy away from more direct damage to the point where even a second copy of fire princess is unacceptable to them. Sadly, it also gives little hope for dystopia, dynatag, dunker.