yeah, i think ICHIGO will have new development in controlling the hollow's power cuz up to now, he can only transform and hold for 11 sec.

And i remember 1 part where ICHIGO confronted ICHI Hollow that time, the hollow said something like, "if you really intend to have control over my power ... then, until i DECIDE to appear the next time..."

so i believe, the inner hollow will come out to help him during 1 of the battle in heuco mondo ..