It's odd that this just came up. I had an experience with POM juice that turned out awful! Here's the story:
I got two 1.4L bottles of POM pomegranate juice that I was going to use for a one gallon recipe. I combined that with enough sugar and water to make it up to 10%, trying to make a wine suitable for SWMBO, and the required amount of nutrients and what not. I used Lalvin KV1-1116 to bring out the fruit flavors, and let it ferment to dryness.
I bottled a few months ago, after one racking and cold crashing. I used only 375 ml bottles, as they were to be hers. I opened up one a few days ago out of curiosity, and jeez! It was like some form of cruel and unusual punishment. It was terrible, and quite possibly the worst wine I have ever tasted in my life. It was beyond tart, and could have used some back sweetening. I'm debating whether to throw it out and reclaim my bottles, but I'm going to let it ride just a little longer to see what happens.
It probably should be blended with something to bring down the pomegranate flavor. Hopefully yours will turn out better than mine.