After Realm 2, the future Realms will be much larger in scope (potentially being around the size of Realm 1 & 2 combined). At the end of Realm 2, you have the ability to export your save. Realm 3 will be a separate game where you can import your Realm 2 save into Realm 3 :) we will either set up a new page for Realm 3, or will add it as a separate download on this same page. We've not worked out some of the finer details yet.