TheImmortalPhantom
Danny was never a Fenton, or a Grayson. He was a Wayne; the older brother of Bruce Wayne. He was eleven when it happened. They were coming back home from one of Bruce's favorite movies. When Joe Chill killed their parents, Thomas and Martha Wayne.
Bruce had been taken in by Alfred Pennyworth, a family friend. Though, when Danny tried to get their attention. He realized that he couldn't. Danny was invisible.
Disclaimer---
This cover does not belong to me (JJmk-JJmk on Tumblr). Neither do Danny Phanton or DC.