Since they did suspend it after the earthquake in Japan, I hope it is not asking too much to do the same for NA?
I do not know about the plans for Shirogane. This will be SE's decision. I can however imagine the frustration of players if they do delay it.
Example comments may include but are not limited to:
"Who cares? They have bigger things on their mind than losing out some virtual game house!"
"We are paying customers and our enjoyment should not be affected by external factors that do not impact us at all!"
"Do you lots have no compassion? What if you were in that hit zone?"