I think you have to do both.
I think you have to do three things. You have to do refugee resettlement, improve the conditions where they are, and try where possible to get them to return. It's a very sensitive issue. Return is very sensitive always, because there will always be someone who will say that the situation is not right for them to go back.
The criteria for us are three: it must be voluntary, safe, and with dignity. This is where we hope to do a pilot project eventually with UNHCR to have some of the Rohingya return to northern Rakhine State, but it's very tricky. There will never be full agreement as to whether the conditions are right to return or not, but many of them want to return. They don't want to return now, but when the conditions are right.
I think the World Bank will probably play a major role in rebuilding those villages. Whether they do it as a project or provide the money to the Rohingya to rebuild their villages themselves is not clear to me.