User blog comment:Darknesslover5000/Where do Arrancar go when they are slain?/@comment-1677140-20100506014536

In one of the very fist episodes it is stated that hollows that did no wrong while alive as humans reincarnate in Soul Society while the ones that did bad as humans go to hell. Think of Hueco Mundo as a limbo for lost souls. By this fact, you can consider that even Arrancars will do the same thing due to them still being hollows.