I think if they are able to get character data, then they will likely restore all the servers, at least for a while.
Since it doesn't save any money to not have them (they are virtual servers, not physical ones) all, why not? It will avoid the problem with duplicate names at relaunch which is going ot be a problem if you merge at launch as you won't know who is active and who is not. Once the game is up i could see them merging low population servers, but by then active players will be able to prepare for the merge. Non-active accounts can be cleared to reduce the conflicts and free up names.
It will also be quicker and easy to relaunch the fewer changes you make.
If we don't get the data back, then Yeah, probably a lot less servers. I would work out a new naming scheme that way no one will feel slighted since no one will have an old server name.