Let's hope that these reissues of Seasons 1, 2 and 3 are an indication that they're getting even closer to finally being able to release Seasons 4 and 5 and that they're almost done clearing all the music copyrights and stuff. (Maybe these reissues will help Disney get even more of the money that they need in order to pay off the rights-holders/legal people.)
After all, it's not Disney's fault that Seasons 4 and 5 have been withheld from release because they do want to release them very, very badly. The only ones to blame for this are the stubborn rights-holders/legal people, the 2008 economic crash (which we are STILL recovering from) and the Republican Party.