How will Primal and Praetoia Meet Up?
I would guess that Praetoria's critical failure rate with native supers--90% of them disappear "overseas"--must be leaving them short on meta-power. If so, it's not wonder the DE have been able to run amok, and there's no telling what kind of imbalance that's introducing between them and the other nations on Praet-Earth. Since Tyrant has reason to know of the huge number of supers zipping around Paragon, he may have some notion of trying to "recruit" some of them. He may also have some "Justice Lords"-esque notion of conquering Prime for its own good, since we haven't managed to crush our villains for ourselves.
Regardless of his reasons, his current approach isn't working. Prime and Praetoria have been raiding back and forth for years now, but both sides have been concentrating heavily on the upper-echelon supers. As a result, neither side has been able to hold onto captives--they've been too powerful/clever/plot-armored to keep contained. He's going to expand his Prime operations by having Loyalists infiltrating or invading Prime; that's why they leave Praetoria for either Paragon City or the Rogue Isles at 20. The Resistance, of course, would want to send agents and advisors through to counter the Loyalists.
The Way of the Corruptor (Arc ID 49834): Hey villains! Do something for yourself for a change--like twisting the elements to your will. All that's standing in your way are a few secret societies...and Champions of the four elements.
Recluse: "ANOTHER Marcus Cole... sonuva... wait... and that one actually killed 'me'!?!?!!?"
(That's almost exactly how the devs explained it. I lol'd.)