So for which members of the Fearsome Five+Bradley is going after us; I am gonna try to make a list on how likely each are. Least to Most Likely
Liquidator: Not only the Danville in a region that is very dry for a Hydrokinetic to function, but also Liquidator is infamous for being incredibly painful to write. If I had to guess a city he'd attack out of the 6, I am gonna guess Cape Suzette, followed by Zootopia and then New York. Cape Suzette is well, a Cape and he serves as a fun counterpart to the most Business Oriented of the Kings; while Zootopia has the most possible devastation a Hydrokinetic can inflict. New York is also built on and around an island. If he does attack us, we should use Powders and Electricity to incapacitate him.
Bushroot: He really has no reason to hate us since we're one of the most Green Kings and he is a massive Conservationist. For what he will go after, it's basically an inverse to Liquidator. Zootopia first do to being an ABOMINATION OF TERRAFORMING. Then Cape Suzette has an oil baron running it. If he attacks, think whats good against grass types, that should work against him
Negaduck: Mostly because its implied he's sending another member of the 5 here. For where he is going, LA, Duckberg and New York are the 3 juicy targets I feel he'd be after. He is a Toon (GMs said not all the 5 are toons so this is important), so its thematically good for him, he has beef with Glomgold, and he has been frequenting the Bazaar and taunting Xanay. If he does attack; PRAY.
Quackerjack: I feel he has a chance to show up, with his big cities being Danville, LA, and Zootopia. Like Doof he is an eccentric mad scientist, albiet murderously insane with a hatred of VIDEO GAMES. LA was where he was operating immediatly after Saint Canard, so he knows the area and it has ENCOM, where his most hated enemy ONLINE GAMING gets its power. Finally, Bellwether is a gamer /s. If he attacks its probably just a straight up brawl, just dont attack his doll.
Megavolt: Member of the Fearsome Five I feel the most likely to attack us, his big Targets are likely Cape Suzette, Danville, and LA. Danville has a history of power issues, so his short circuiting the system will be devastating; along with making appliances like Coffee Machines. Khan is the worlds #1 Power Supplier, so that makes Suzette a juicy target for him. And LA has most of the Encom Severs, so a power attack there could be devastating. If he shows up we should either redirct his electricity back at him, use high pressure hoses to short circuit him, or make a GIANT RUBBER MAN!
Finally there is Bradley: He is gonna go after Danville, Duckberg, or wherever Negaduck thinks this moron will cause the most damage. Danville because Max, Duckberg because Spoonerville is nearby. We beat him by putting him near any character with decent martial.