Can it? Sure. Will it? Undoubtedly. But that doesn't mean we will stop talking about this.
I'll echo some of the voices above that I think it's very unlikely KK won't continue to be the starter. I think she runs the offense better and provides the stability needed at the point in the beginning of games.
I'm less confident about Ashlynn. She plays hard in her presence is felt all over the court often in ways that do not show up in the boxscore. At least through the end of the year, I think she will continue as a starter, but undoubtedly Heckel and Blanca are making cases for themselves particularly with their offense.
If I were to guess I would anticipate both KK and Shade continuing as starters, but their minutes would be reduced in order to make more time for other players. Ultimately, that's probably a good thing as it lets every player give maximum output during their time on the court.
One final thought, which I think is a little counterintuitive, Blanca and Heckel may get some minutes from Williams. While they aren't at the same position, Geno has shown a preference for his small ball lineup. Ultimately there's only 400 minutes to go around. As players such as Blanca and Heckel show they can contribute, minutes will have to be adjusted to get them playing time. But that doesn't need to be a position for a position sub like you would see in football. I like playing the team with less individual minutes as I think it allows the players to stay fresh during the game and hopefully makes them less prone to injury.
(For what it's worth, I like Blanca as a sub for Strong for at least a couple of minutes per half. No one can replace with Sarah can do, but two minutes per half would reduce her to 36 minutes overall, which I think is more manageable and Blanca, though not yet the complete player that Strong is, offers a high octane boost to our offense. Opposing defenders breathing a sigh of relief as Sarah goes to the bench would inwardly groan when they realize they now have to account for Blanca attacking at 100 mph.)