In a recent interview with TV Series Hub, WWE SmackDown superstar Mandy Rose revealed that she was the person who pitched the Otis storyline to Vince McMahon.
“Otis always was around in NXT and posting pics of me and talking about how much he liked me in a cute way, not a creepy way. This continued on and I thought it would be great if this became a storyline, especially once Otis entered WrestleMania. I actually went to Vince McMahon myself and pitched the idea and he loved it.”
The interview is available in full at this link.