Back in the earlier days of comic books there were a lot of minor publishers who had their own line of super heroes. Most of them eventually went out of business and DC sometimes bought up the rights to the characters and introduced them into the DC pantheon. Captain Marvel, Plastic Man, and Blue Beetle are some well-known examples of characters created by other companies.
But there have been a lot of more recent comic book companies that have gone under. Has DC bought any companies since Charlton back in 1983? Or has creator ownership pretty much killed off this practice? Or has DC’s own financial troubles stopped it?
And did Marvel ever do this? I can’t think offhand of any characters they brought over from another company but I may have missed it.