Board Thread:Questions and Answers/@comment-28487792-20160522100333/@comment-16461120-20160523063133

Retroactive continuity, or retcon, is an unfortunate fact of any expanding fictional universe developed by multiple authors. That being said, major changes aren't common, it's typically just minor details like which prison Rocket met Groot in, which aren't really a big deal in the long run, just look at them as the creative license of the storyteller.