Hi, I believe a set based on the Dragon Ball or Dragon Ball Z property is a very real possibility. If you consider the LEGO group recently started accepting IDEAS submissions based on a range or anime franchises, including Dragon Ball Z. This is likely a marketing strategy to gauge how much attention these brands attract before purchasing the distribution rights. There are many incredible fan designed sets up there right now. My own included. So… if you are a fellow fan of the Z franchise and hope to see a set on shelves soon, get over there and show your support!
https://beta.ideas.lego.com/challenges/f96d0c7c-0b1c-452a-9154-fec69b32717d/entries/02f22a8d-d619-4895-a33e-3a9b67b9add4
https://ideas.lego.com/projects/94ce515c-96e5-4673-90da-988b0dd91e53
https://ideas.lego.com/projects/ca74bf11-0f13-4847-ba1e-314d832eb6db
https://ideas.lego.com/projects/6fa2719d-0874-46c3-b734-21638e819e75
https://ideas.lego.com/projects/6214a3af-d059-4419-9e74-596514ac7b8a