I am not sure if it is a good idea to reunite Catholic Church with the protestant churches.  I doubt it will happen.  
      
We have witnessed the corruptions of monarchical clergy structure and still fighting CI (Catholic Institution) clergies, men’s, dictatorial abuses.   We should always remember that clergies are a mere human neither God nor holy or enlightened.  It seems only the few individuals reach holiness and enlightenment.   We are lucky if these clergies are not the criminals.  We have seen downright criminals through the clergy sex abuse scandals.  And we should try to avoid at all cost from fortifying the corrupt monarchical organizational structures.      
It will help to communicate and share the notes of spiritual matters and collaborate on charity works.
According to Teilhard we are moving from individual consciousness to Global consciousness.  He call it a Second Axial Period.   NCR should explore the ramification of we, human family, living global consciousness.