I think he will choose the uchiha but he will see that these shinobi are s rank...but still not be intimidating then hashirama will leave because he feels the village now an the time now should take care of the mess....my opinion.
Note hashirama is the god for all senju believers but sasuke in the past showed highly respect for Madara dont you think he will want answers from the real madara knowing he thinks tobi is the real after finding out that his own clan god is alive....@kyoWhy not Uchihagakure? you may be right also but i always wonder will the world accept him knowing all he had done