Zuckerberg is competent at BJJ. Musk has not shown any ability to grapple before. If a fight between them were to be set up, Zuckerberg's advantage could be overwhelming. It is possible that to mitigate this, a fight will instead only be limited to striking/stand up.

If a fight takes place before 2025 between Musk and Zuck where grappling/wrestling is legal, as in MMA rules, submission grappling rules, wrestling rules, BJJ rules, Judo rules, etc., then this market will resolve YES.

If no fight takes place before 2025, or a fight takes place but it is limited to standup/striking, as in Boxing rules, Kickboxing rules, Muay Thai rules, etc., then this market will resolve to NO.