I'd honestly say they've got to be very slim, mainly because Knott's is so nearby. Why move in a new maze that a lot of people will have already done barely an hour away? When mazes are swapped between parks, they should go to a park that would generally not get to experience it. Hence why we've seen Knott's mazes go to Carowinds (Paranormal, Inc.) and SF Fiesta Texas (Cinema Slasher). Tooth Fairy was at CGA for a bit, but I think it moved to another park further off later. CGA also had Mirror Mirror for a short time.
So if we got another maze, I think it'd be from a park quite far away. And based on what I'm hearing from social media, most other parks far off don't exactly have great mazes, so a swap there would likely be a downgrade. Funnily enough, SoCal seems to be the haunt maze leader. So I'd be really surprised to see us get mazes from other parks... unless maybe they swap out, say Conjuring for TCM.