No you wouldn't. They ran "season 4" (two movies broken up into 4 eps each) on Cartoon Network a few years ago, exactly once. They finished the plot they started in season 3 with the virus that had infected the guardians, but ended it on a major cliffhanger. I'm told it was an effort to get the fans to poke CN to order more eps.

Worth watching for the sake of continuing the story, I suppose, but the ending is incredibly frustrating.