Most of the Wal-Marts I've been to don't even use those endcap longboxes for the figures. They just shove them on the pegs with the rest of the figures and toss the boxes out completely.
As far as the case assortments go, I seem to remember 4-inches.de had a case assortment of figures that wasn't the long boxes (as it had a couple of wave 9 figures included) of the WM wave, but I don't recall off the top of my head when I saw it. It was probably at the same time they had the photo of the long-box cases, but I'm too lazy to look right now.
A shiny nickel says that the Mace Droid disappears post-haste and we're seeing a sea of Aurra Sings and Labria in the clearance aisle in three months' time.