I do remember Espinoza explaining that Boots was a guy he wanted to keep on Showtime, but again, we've seen big names, like Joshua and Canelo, jump to other networks on a whim. Not to mention, Al also basically forcing showtime to take a backseat for Fox recently. Loyalty to Showtime seems to be flimsy.
I don't think it's too far fetched to think that Boots could be brought onto DAZN so long as Haymon isn't his manager. I'm sure that Haymon and Espinoza are working in tandem to keep him on their side of the street too, though.