I don't have a link to it, and it's been posted a few times and then taken down (more than likely a copyright claim) but if you look up #bonjovi2020 on instagram and scroll through all the reposts about the new tour dates, you'll find a 37 second video which I believe is a leak of a part of the new song. It includes vocals that sound like Jon's, slightly higher than normal (probably cause someone had to make the song faster so it wouldn't immediately be taken down). It sounds like the verse of a song, so it doesn't include the name of it, but I'm guessing it's The Story of Love since that is the most likely song to have any leaks right now. But I haven't been able to find it anywhere else. Do with this information what you will.