Probably the biggest issue is thinking of a name that someone hasn't already used and is now kept in cold storage, unused except for an annual registration with the folks who license business ventures and trademarks here. For that reason alone I'd skip the Capital name altogether, since everyone seems to have their own capital of some district, and Capital Brewing is already used in the US, in Madison, the capital of the state of Wisconsin.
FWIW, Trouble Brewing is one I've not yet heard, and does lend itself to "clearly trouble," "deep trouble," dark trouble," "double (bock) trouble," etc.