There are a number of Wonder Woman movies but not one movie with Rocket Raccoon as a main character and Guardians of The Galaxy Vol 3 where he actually did play somewhat of a major role to the movie. Note as well I found it on Reddit as a 10-year-old post so Guardians of The Galaxy Vol 3 wasn't out yet and basically yeah the first movie was still new so yeah 2014 is when this meme was made. Is the joke meant to point fun at the fact that people criticize Wonder Woman movies cause the most recent one at this time was in 2011? I honestly just don't get what this joke is trying to convey.
The Marvel's main characters are newer, but they are outdated today too. The difference is that Marvel kept recreating them.
My impression is that Marvel people are just more rebellious and iconoclastic.