Hey GIZA!
I like the name Hammercade (badass). But I would take kcorcoran's advice concerning the two characters, or even just flip-flop the two sides. The effect on the white hammerama shadow is cool but I would like to see it match the color of the first hammercade's font (used with the reddish Hammercade logo).
I would toy around with different fonts and maybe the vertical placement of the text.
Personally I really like them all i just need to see more of the fist guy. And the chops/punches would be best (composition wise) outward, IMO.
Just play with it!

Nice project though, all in all I think you will have a REAL sick cab!
-=XD=-