Looks like Hasbro is planning some big promotions for their new action figure line based on Indiana Jones. It appears that each of their toy lines will contain an exclusive redemption certificate, good for a free toy! The toys that you will be able to send off for are as follows:
In the Adventure Heroes line, you can send in 6 different Indiana Jones stickers for a Indiana Jones Figure with Horse!
In the 12" line, you can send in 4 different Indiana Jones stickers for away for a 12"-scale Ark of the Covenant!
In the 3¾" line, you can send in 6 different Indiana Jones stickers for a Crystal Skeleton Figure with Throne!