[quote=@catchamber]
I refrained from suggesting ideas for the new world, as I wasn't sure what Wildman13 had in mind for it.

As for the relevance of real world nations, I'd say any nation with properly motivated and equipped subfactions can do a lot. How much they can do depends on the relationship between the worlds. Do portals open? If so, where and how long? What are the geometries and limits of these portals?

Alternatives include displacement and blending. Displacement switches regions between worlds, while blending physically merges them into a hyperspace. The former would be a brief event for a volume like a city or biome, and the latter would be a sustained effect of similar size.

How the story plays out depends on how the worlds interact.
[/quote]

Well said. Plus, if this merge happened, would it be as we started the TP of years before?
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Another question that comes to mind is how closely we want the "real world" nations and organizations to resemble our own. Maybe they're a bit in the future, and there have been some political changes. Just a suggestion.