Thx for all the great comments guys!
To Boosted: Im relatively new to photoshop myself, so im not sure what to tell you. Theres numerous ways you can cut out pictures.. i take the longer (and i mean long) way of doing it. What i do is simply use the lasso tool and freehand it (i zoom in very closely). However, to save you a lot of time, you can use the magic wand tool and select the areas you want to delete (make sure you test out the tolerance first).
Also, if you notice, for both darkseid and brainiac i used toy figures. The way i make them look more prominent is through lighting/shadowing. Use the burn tool to do this.
Hope that helps