So here's the deal, we are getting book XV, and i've went to the test realm and it was nice and all but there are some more questioning about the lore.
1st - There are still tons of stormgates and skyways not accessed yet, so are we going to go there? And also the one in Calambria Skyway: Stormgate to Polarisé
2nd - Ambassadors got my attention in Florenza, there was grizzleheim's ambassador.
So maybe Polaris (Penguinia) and GrizzleHeim are the next worlds?
I think Dragonspyre (Avernus), Rajah (Marleybone) and Celestia/Azteca (Skull Island) should be side worlds.
Mirage should be only for wizard101, and krokotopia should come as a main world!