Atlantis Rises 1 with the introduction of Ursena and Muggy presented the beginning of the shift of balance of power towards the Atlantis and the Lagoon families (Atlantis family has 4 5*, one less 3* than the two families, and Lagoon family having one more 3* than the other 2). That leaves us with the Sakura family. Ursena is an unique creation, and Muggy is an improved version of the Chameleon Mugger enemy in Atlantis. Not peeking in the beta thread, but are there are any other Atlantis heroes being made?
Since there are no more new story content for Season 2, perhaps Sakura family might make an addition by improving another map enemy? Maybe the Oni Warrior? Perhaps make him a 4* Green, as Sakura family doesn’t currently have any nature heroes. With the family crest depicting Cherry Blossoms, I am surprised there is currently no nature aligned member of the Sakura family.