Imagine an open world map, with all or some of the locations from each match there, players can join 1 of 3 kingdoms that are already preset, tenosia, agatha, mason.
Players would be able to have proximity voice chat as well, making it very immersive. With that, players could gather materials, find materials and more to craft weapons / sheilds / arrows, can sneak into other kingdoms or sub bases to get more materials and such.
Something like this i think would really hit hard, everything is already made, just a few new scripts and some oceans / land masses between the maps.
servers could be public and hold x amount of people each, say 200-300.
there could be boat tech introduced, horses for transport, and just the fact it would be an open world would be insane, imagine having food and hunger, having to farm and craft everything aside from buildings and structures, inventory system, armor grades, everything.