as for another international team (separate from whatever mainstream grouping Captain Britain heads up), i might suggest Interpol actively recruiting superhumans and costumed adventurers. my idea would be for it to be a repurposed Contessa Allegra de Fontaine's idea. she's kind of dropped back into limbo now that Nick Fury has been put out to pasture. i can't imagine her staying inactive for long. and she has some real talent as a supervisor. i figure she starts with the characters from Union Jack's last mini (sabra, arabian knight, and Chapman). i'm lukewarm on the arabian unless they can flesh his personality out a bit more. i think that there needs to be more to him than the magic sash and sword.
otherwise, i would love it if Nightcrawler returned to the land of the living and rejoined Braddock and whatever's available for an X-caliburesque team. maybe Amanda Sefton can be revived, as well; to give Kurt more of a reason to stick around. they already have Dane and Faiza. Meggan would naturally be around. Blade, i'd probably move over to Union Jack's darker themed team.