They are removing Wildcat to expand the midway, not for a new ride.
They had already started training this year's ride crew for the ride when the decision was made. They had also installed an elevator to make the ride ADA compliant in the off-season. Something must have broke and they just got tired of fixing it.
Expanding the midway there will allow more guests to watch the new night time show they removed the big screen for, but the midway was already huge there, so whatever.
Wildcat was a good midpoint between the kiddie coasters and the bigger stuff, so hopefully they replace it accordingly instead of shoehorning an el loco or zacspin just to try to get the coaster crown back.