I agree that continuously raising the stakes will just be... comical, at one point. I'd like the future arc to take a step back and have the WoL return to their adventuring roots: exploring for the sheer joy of it.
If I was hyped for any part of Emet's teases, it was... ok, everything, but in particular the "golden cities" in the New World, which sounds like a huge reference to El Dorado. And if the New World is the American continent (or "the Americas" if you're from the country that named itself after the continent) there's a crapload of stuff to explore. The Nomadic tribes in the north are very different from the Settlers in the South, even if this is a New World pre-colonization. Of course, we already had a Mayincatec civilization in Ronka, so another one in the New World may be too similar-yet the myth of El Dorado is specifically thought to be in Colombia, also parts of Venezuela and Brazil... or it could be about the Seven Cities of Gold in what's now the New Mexico desert aaaand I'm rambling.
Point being, there's still a lot of undiscovered places in... the world that we don't need to go looking for lost civilizations in the stars. Heck, the map of Ilsabard is STILL covered in clouds over 4 years later.
Emet was right, we haven't even explored most of the KNOWN world
Not to mention, we also have Dalmasca and specifically Valnain to visit... Fran owes us an invitation. :^)