i believe that might guy will die as i believe his death has been set up with his gates as once you use the 8th gate you become super powerful and die shortly afterwords .
now guy had to use the 7th gate to take out kisame while that is a feat of its own
but now the enemy's we have been presented with are of a different class.
We have kabuto madara tobi and a whole bunch of zetsu's along with some remaining edo tensai's running about and sasuke doing his "Thangg"
right now we are seeing guy with kakashi killer bee and naruto fighting of tobi or well mainly tailed beats and tobis version of the 6 paths but i believe that at some point guy will go 8th gate to beat either tobi or try and rescue someone or fight another big bad guy all together but yeah tats juwt what i reckon
guy going 8th gate owning everyone and then dieing as a result of using the 8th gate as it has been stated before