Curate, connect, and discover
Danny, having been dead for a very long time, decided to reincarnate, because I love that trope.
He reincarnated into the clone baby of Kon that Tim was trying to make. But Tim couldn't ever get over the hurdle that kept making the clones inviable, so the 100th was just half his DNA and half Kon's.
Danny is the son of a teenage father, who is grieving the death of his other father, and apparently a lot of other people if the ghosts surrounding the teen hero have anything to say.
Danny had reincarnated for a go at a lazy, nice life. Just relive being mortal for a bit.
Instead, he's kidnapped by Ra's Al Ghul to force Red Robin to take care of the Council of Spiders.