Text doesn't need blending, it just isn't very well done. The first sig has a nice idea but the quality/effects you've used makes it look terrible (no offence) but it's too unclean. Did you do a spatter and then put it on colour dodge or something? Also, the white glow on the right shouldn't be there because it's confusing the lighting, as on the render, the light is on the left side of his face.

The batman one is a bit too monotone, and there is too little in the background, and the white glow is pretty distracting, learn a bit more on the basic concepts and steps of making a sig and you'll improve a lot more . KIU.