[Fighting] Official cross-promotional bout involving UFC fighter in the next year

Created by Cato on 2019-05-05; known on 2020-05-05; judged wrong by Cato on 2020-05-06.

• Cato estimated 20% on 2019-05-05
• Cato changed the deadline from “on 2019-05-05” on 2019-05-05
• Cato estimated 19% on 2019-06-12
• Cato estimated 11% on 2019-09-19
• Cato estimated 9% on 2019-10-09
• Cato estimated 8% on 2019-12-06
• Cato estimated 7% on 2020-01-10
• Cato   judged this prediction wrong on 2020-05-06.