If he says yes, you have your answer and you can work from there, maybe even indicating that you’d be willing to step aside if he’s willing to be an adult about it and have a conversation about your ongoing participation in the org

Thanks for this answer, it reaffirms the most likely path I've been considering which is that if he does eventually come out and explicitly express interest in my position, I think the best thing to do for all parties involved is for me to not compete against him and support him in his endeavours