If the ban lifts, I am sure many many many lamas, items, sacred statues and thangkas will come out of the closet. How can it be that a protector that was once so revered suddenly gone so low key just like that? Alot are in hiding, and when the ban is lifted, I feel as if there will be an explosion of Dorje Shugden everywhere.
I feel that countries like China will have Dorje Shugden's practice far and widespread across the country, Dorje shugden's practice will be done in alot of other countries and it will be bigger than before. Since Dorje Shugden is a protector of our time, his help will come in many ways, swift and fast, and it will benefit numerous individuals.
Regarding the monastery, I agree with @Big Uncle and Barzin. I feel that those who still cannot accept DS's practice will be okay, they will harmoniously live together with those who do, and not create any tension. And for those who have surpressed Ds' practice.. when the ban is lifted, I am sure that they will realise how compassionate HHDL is to have even started this controversy in the first place.