Zomberry Island

The Unnamed City Island is an upcoming Island on Poptropica. It looks like it will take place in New York, according to Daily Pop sneak peeks. And acording to a Creator's Blog post, it may involve zombies. A Female Poptropican,

Theories
Giant Dragon's Theory

Giant Dragon thinks that Unnamed City Island could finally be the release of Monster Island..

Happy Rider's Theory
Happy Rider thinks that Unnamed City Island may be Monster Carnival because the monsters could of ruined the city.

Dangerous Knuckle's Theory
Dangerous Knuckle thinks it could be apocalypse island or something, because, it says "the day the island stood still, or the morning," ON a poster.

Trivia

 * One of the Daily Pop previews shows a restaraunt named, Work and a Hard Place, which is based off of the saying, Between a Rock and a Hard Place.
 * Joe's Donut Hole may be based of off Randy's Donuts, a famous donut shop just outside of Los Angeles, California.
 * Another Daily Pop post that may be for the Unnamed City Island shows a small, stuffed version of the Jersey Devil.
 * On one of the Sneak Peeks, if you look on the top, there is a tower that says 'M Mews Corp'.
 * This may be a sort of continuation of Cryptids island because of the building M Mews Corp after Harold Mews and the stuffed Jersey Devil as the Jersey Devil was one of the cryptids you discover in Cryptids island. Also, monster-related sneak peeks for the island were shown.