I saw the Target clearance, too... was really tempted to get Deluxe Mumm-Ra and a 2nd Deluxe Grune just due to that.Pretty good ending to the season (many are speculating series ending). It will stink if this is it because, and I will spoil slightly, the season ending didn't end - it was made to continue on to the next season. It was also nice how in the season finale they tied together a lot of the story arcs.
Now, having said that, today I saw that Target put everything from this line on clearance and I am thinking others will follow suit. So, unless they are looking to make a packaging change and just saying out with the old - stick a fork in this line - it is done.