5 Below isn't a normal retailer, they're a discounter... Stopping in and looking doesn't hurt, but they're not likely to get regular rotations of new SW figures... They may get some, but that's like saying you're adding Family Dollar, Big Lots, Marshalls, TJ Maxx, Ross, and Tuesday Morning to your daily stops too, as any of those coudl also wind up with the mysterious warehouse of 2012 TVC figs.
As far as Sears goes, it depends on the Sears. Sears Grand stores, which are large and have a section of stuff like food, greeting cards, household items, and also a toy aisle, are very VERY likely to have SW figures. I know this because, since my Sears Grand opened, they've pretty steadily carried SW stuff. They'll go a little while with nothing, but they've almost always had something on the pegs. They restock about as often as K-Mart does, maybe slightly less.
Regular Sears stores that aren't the Sears Grand stores, they tend to not have a toy area till XMas I believe.