Are you asking to add Columbia to the list of production countries? I'm not too sure how that relates to the Sony email leaks. You should check out the guideline on production countries.

Oops, lol, I guess I should have clarified. I was not talking about Columbia the country but Columbia the film studio, which in turn is owned by Sony.

Do you have proof they are credited as a production company in the credits? A mod removed Columbia Pictures a few years ago.

It's not on Netflix anymore here in Germany so I can't check but they're certainly still credited along with Regency in the official trailer on YouTube https://www.youtube.com/watch?v=O3mf_ewjc7s and on the poster https://www.imdb.com/title/tt1243974/mediaviewer/rm830665728/.

They're only credited as the distributor though. It doesn't say whether they were involved in the production.

This is where the leaks come in: https://www.ibtimes.com/amy-pascal-hacked-aloha-email-fired-sony-exec-reviewed-bradley-cooper-movie-1943149

Quotes:

"I'm never starting a movie again when the script is ridiculous, I don't care how much I love the director and the actors. It never ... Not even once ... ever works,” Pascal wrote.

At the time, the film had just been completed, and Pascal was concerned about its prospects, the email revealed. “We have this movie in for a lot of dough and we better look at that,” she wrote.