Why is that a tip-off, you may be asking? Because there's a suspicious new file on Poptropica's servers now, called "lands". Here's the only thing I found inside (link to it on Poptropica):
Interestingly, that's not the name of a hammer, but of a stallion who helped a builder construct a wall around the gods. Kind of appropriate, as this lets a huge number of players design islands for Poptropica -- crowdsourcing, anyone?
Sadly, Lands is not free (either that, or it is free but Members-only). I can't wait until we get the upgrade, since the Creators have confirmed it -- until then, you can still play the old Land Prototype!