I'm heard about superstall once in Saab draken. Superstall occur at
AoA greater than around 16 degree.
Which at that point the Vortex on the wing which create the lift was start to break down or burst at the outer portion of wing fisrt which will create
the similar "pitch up" characteristic like the swept wing having a wing tip stall.
As the AoA increase the vortex bursting point start to move inward which
causing the aircraft nose to pitch up and also add the enormous drag which
If i recall correctly, the Draken can't increase the speed during the superstall
with full throttle & afterburn.
So to sum this up: higher AoA -> higher drag.
Best regards