Amazon has the 2-Piece Batman & Man-Bat 4" Articulated Action Figure Set w/ 6 Mystery Accessories for $8.80 with free shipping on $25+ or with Prime. Man-Bat!!
Best DC Toy Deals, Superman / Batman Toys on Sale
Amazon has the DC Batman Batmobile & Batboat 2-in-1 Transforming Vehicle for $16 - $4 off coupon (check "Apply coupon" box) = $12 with free shipping on $25+ or with Prime. Target has it for the same price after 25% off Target Circle coupon (click "Save offer"; Exp 3/13). Works with 4" action figures.
Amazon has the DC Batman Mega Gear Deluxe 4" Action Figure w/ Transforming Armor for $5.50 with free shipping on $25+ or with Prime. Walmart has it for the same price (no pickup available).
Ends 1/26. Target has the DC Batman Launch & Defend Batmobile RC w/ Batman Figure for $20 with free in-store pickup or free shipping on $35+. Has a spring-loaded eject feature so you can launch Batman (or any other 4" figure) from the car.