What are Squirrel Girl's weaknesses?

Yes that is true. I know for a fact, for example, that the Infinity Gauntlet only works in the Marvel Universe

Darkseid can't use it unless he's in the Marvel Universe.

How popular is Marvel's Captain Britian in the U.K.?

Not very, quite niche.

I remember when it came out, quite a fanfare, first Marvel comic to be issued over here first.

When our comics went into a decline Marvel fared no better.

Okay. Are any DC books popular in the U.K.? Does DC cater to the U.K. market?

Usually people don't take into account comic book universes and specific incarnations of characters when they discuss hypothetical comic book battles especially crossover battles.

I thought you were going to provide a general overview of who you think would win in a fight against Squirrel Girl, given the characters I listed.

Not especially.

Somewhat relevant, but there was a "British Invasion" of sorts in the comics industry in the 1980s, where writers and artists from the United Kingdom began working for DC.

The most well known British creators working on American comics were Alan Moore (Swamp Thing, Superman, Watchmen), Neil Gaiman (Sandman, some issues of Batman), and Grant Morrison (Batman, Justice League, Animal Man)

https://www.gizmodo.co.uk/2016/03/how-the-british-invasion-changed-the-world-of-comics/

Some of our best talent working for Warrior and 2000AD made the move but a lot stayed here.

Alan Moore's working of Captain Britain was very good, but I prefer their home grown stuff like V for Vendetta.

Btw, the film is a travesty, read the graphic novel.

Now the most popular comic in the UK is Viz, a parody. I don't think Mr Goldman would approve.

Those old classic comics weren't as innocent as you make out. Look what Archie used to get up to.

I know about the classic and current Archie books and related titles, and related series such as the Josie and the Pussycats books and the Sabrina the Teenage Witch books, which took place in the same universe as the Archie Andrews characters.

I read some of the Archie books in my youth. I never read any of the Josie or Sabrina ones, but I knew they existed. I recall seeing them displayed somewhere.

I discussed how naughty I never realized and/or noticed these Archie Comics books were in my youth in a thread on another web forum.

Bit too racey for over here.

Korky and Desperate Dan never got up to stuff like that.