I'm not an artist, so I went with something simple and abstract for my cover. I'm really happy with how it turned out, though.
A major theme of my story (which is set in an omegaverse AU) is that claim bites are NOT the be-all-end-all of Alpha/Omega romantic relationships. In fact, they can have devastating consequences if they are unintended, unwanted, or if the relationship sours after a bite has been established.
My protagonist, Dante, has a claim bite from a relationship that ended badly. He is trapped by it, in the same way that the heart on the cover is literally caged by the teeth. However, within the cage, the heart is still whole and unbroken, signifying Dante's ability to heal, and eventually, to love again.
Here's a link to the story if you'd like to check it out!