I'm sorry, but thinking about things like this only make nuisance in the end.
(something to note : the forest-looking, grassy field area we've been seeing in screenshots and videos is actually located in SW part of Indar. We still don't have any confirmation that Amerish and Esamir were shown.)
And don't have firm confirmation that 'at launch = 3 continents'. From What I know, the '3 continents' claim was just leaked from Reporter/Writers/PC gaming websites, not from devs directly.