Well, I was being sarcastic, but that is hard to convey through text. As for whether you aren't just being sarcastic about your belief in reincarnation I can't tell. But there was a clue in "Make New Friends, But Keep Discord" that Tree Hugger may believe in reincarnation in a hippie-religious sense. So in context of the comic, the occurrence of Celestia's lover being reincarnated could be legitimate in canon. Try that on for size.