Maybe in the distant future but right now, unlikely. We'll be doing a few things then heading over to Meracydia most likely. There's a few other places too including New World (*Not Amazon) which is also massive in size. Then there could be places inside the world and other places in Norvandt that we don't know about.

I think the easiest route would be to stay on the planet we're on and reuse existing assets wherever possible instead of creating entirely new worlds. Yoshi P mentioned that they have opened up the possibility but I'll remain reserved and assume Square Enix as a company would rather not increase the budget too much while they extend themselves into a new replacement MMO (eventually). I think the space ship that exists is going to be kept as-is and won't be used for space exploration. :X