I just got back and it was wave 4 they had in stock. It was picked pretty clean. I got General Abernathy/Over Kill, Gung Ho/ Wild Weasel, Link / Night Creeper and Duke / V. Max. There was about 1 of each of those left with maybe a few extra Gung Ho sets. I'm still needing the Snake Eyes / Bike, Storm Shadow/ Kamakura sets.
These cost $12.99 a pop at Toys R Us so I think I'll be buying my "opener" set from Walmart as soon as they get some in.