Obviously its bad. They're gonna shoe horn in a reason why batman looks differebt though. This isn't a Rhodey "I'm here get over it." Situation. Although that would be funny if they did it that way. Alfred would see a silhouette and say who are you followed by the new actor just saying I'm batman. Or something like that.
This isn't a complicated decision you just recast and move on lol He'll be introduced in the solo film and people will just go with it unless it's terrible. They don't need to shoe horn anything and I can't see Reeves doing or being made to.