The Poptropica Facebook Page says this:
What’s this it seems there’s another new Poptropica island in the works!
It still reminds me of Astro-Knights on that Jungle planet. Anyways that’s it for n- wait! Stop! Don’t go yet! The name of the character you win if you win the contest is… Trusty Kid!! That reminds me, you must be trusty and only put 1 Poptropican in the contest. Bye!