This, honestly. I can’t have any worries about Chuck’s new VA or any other character that hadn’t more than three previous voiced appearances.
The thing is, why bring back this specific character if you can't afford to hire his VA to reprise his role? We're not talking about some massively popular character people are dying to see again, a character who plays a major role in a currently relevant game, or a character they otherwise have a reason to promote, we're talking about, let's be fair, one of the most forgettable gym leaders in the entire franchise. Why pick him of all people as the one you're bringing back if you can't afford to go all the way?
Hell, if anything I'd bet there were more Kakuda fans excited about Kakuda's character returning than there were Shijima fans excited about about Shijima returning.