Maximus appears to be a monster truck transformed into an action figure. That is all.
The figure is from a new line called Monster Jam : Creatures by Spin Master Toys. Pretty neat figure regardless that he only sports 5 areas of articulation. Swivel neck, Hinge pin shoulders, and T Swivel hips.
Check the Archive for more figures:
Easy to find since these just came out. I got this one at Target and Amazon has a listing up.