I've only found the Perfectly set...and those are cute, too! I'm wondering if they haven't gotten the others, or just haven't put them out. I found Hidden Treasure, too, but that's it for new ponies. The plushies are gone, only about 3 sets of Perfectly total have I seen, and no new scooter ponies. The shelves are looking a bit bare, so I'm thinking they are about to re-set things again for Christmas time.
That, and I know my Walmart where I worked last year is getting ready for inventory again, then they will get set up for the holiday displays. Maybe then we'll start seeing tons more new stuff!