Since at 60 summoners can get the power of Bahamut, I imagine we could get the powers of other primals, like Shiva or Bismarck, with their trances : "Frost Trance", "Mist Trance" etc...

But the problem is that other primals are "inferior" compared to Bahamut, so it will be strange to get their powers at a higher level while we get the power of Bahamut at level 58-60, no ?

What do you think we will get after 60 ?