@eddz99: I'm sure he meant planets... because in anime, Buu wrecked Galaxies but canonly he destroyed hundreds of planets in YEARS... while Broly Galaxy bust in seconds.
Maybe they were so afraid that they didn't even want to get close to Broly? ever thought of that?
What can Supreme Kaioshin do to Broly?? nothing but get him self killed.
like I said, Broly was developed before the Kaioshins were... also he is a movie character... so of course they are not gonna add the Kaios.
also SSJ3 is nothing compare to Mystic Gohan and Super Buu...