Here is my mandalas of one of my favorite band Avenged Sevenfold. I used one of their album as background. The skull bats are their main logo so I used it to put around the edge. Lastly I added a astronaut in the middle to add the final touch.
Here is my Marvel mandalas I used the Marvel logo as background. I added many Marvel hero’s logo on the sides. Lastly the final touch was Spider-Man logo on top of the Marvel logo.