Here are some stores offering specials with the purchase of either or or bonus packs:
Target offering a free Lorax wearable mustache when you purchase the Lorax on Blu-ray or 3D combo pack at Target while supplies last.
Walmart is offering a pre-order deal -- order the Blur-ray combo pack and enter for a chance to win a Universal Studios 100th Anniversary collection. No purchase necessary.
Plush toy included with the combo pack in the store as well.
Best Buy --
Exclusive Lorax Finger Puppet with purchase of the combo packs.