Chapter 5 got delayed from the 3+4 release because Tobysoft has to make 3 different sets of sprites for Asriel, because he's gonna be different based on which save file you use, just like the contents of his bedroom drawer.

Slot 1 = Cross country shirt = Athletic golden boy Asriel
Slot 2 = School id with embarrassing haircut = Edgy boi Asriel
Slot 3 = Coupon book for large pizzas = Fatassriel