I’m not a regular reader of the series, but I don’t recall seeing anything too sexy, drug related, or political. There’s some gun flashing every now and then, but I think that’s as bad as it gets. If the newsletter is being read by general public, it’s going to be very tough to find one that will appeal to a broad audience.
You should also get permission from the artist to print their comic. Most of them (unless they have their heads stuck up their ass, or their comic is very popular and they’re making lots of money off it) wouldn’t mind getting their comic shown somewhere.