We don't really have anyone else with that combo of pure shooter and willing defender with crazy athleticism. Just based off how much hype Kanon has been getting lately from the media, players, coaches, I'd be very surprised if he was the one in danger of losing minutes to Bosko. My guess is Kanon was always going to split time at the 3/4 and Bosko will be taking minutes from Fous and Mag. It may even be Kanon starting at the 3, Bosko at the 4, we'll have to see.
I'm also predicting at this point that Baker will have a much smaller role than anticipated, which frees up a rotation spot for Bosko.