User blog comment:ACGuy/What do you think will happen to Gumball?/@comment-4060139-20120926224558

most likely new voice actor. fans may not like it, but what else can be done? If Gumball and the gang grows up, it probably wouldn't be the same show. I'm not saying I'm against it (grown up Carrie would prolly be HAWT), but I like the show the way it is now.

another thing I've seen in stories like this is the original cast graduates and gets replaced by a different cast, with certain characters remaining behind (like, Miss Simian, Mr. Small, etc, would stay behind to run the school). Think Total Drama Island. this approach is successful sometimes, but I can't see that happening to this show.