This looks like an okay poster, I like the border the most, along with the top text. The logo looks clean but the text near it is kinda blurry which is not good, and the last 'M' on the Summerslam looks really bad. Both titles are bad quality and the background is a tad bit too sharp. But overall this is a good piece, the colour brings everything together quite well. Only advice I can give you is, try to make everything look clean, even if the style is grunge or abstract. Try not to enlarge images as that will ruin the quality, and add some more contrast to the pictures through the Brightness and Contrast options or the blending option Soft Light.