Well in the beginning, the Shinobi Alliance had trouble sealing the old Kages, to the point they had to weaken them first in order to successfully seal them.
I thought it was the catching them in the seal that was tough not once they were sealed they broke out.
But yeah I get that it's the Fuinjutsu at hand that plays a role in this all. Like I said I just hate the idea of it, mainly cause I just am stubborn and wanted to see Gara seal him.... Although that wouldn't have made as good as a fight I suppose.
Regardless lets see here. I don't want to leave anything out so someone account for me the status of all the Edo Hokage. I would have to think someone would try to remove those rods from the First or just destroy him so he can reform without them.
Really though this Madara is one bad kitty if he actually takes on the current Kage, previous Hokage, reunited Team 7, Oro and company, the Biju, and everyone else. I think Madara is being made to be a little to strong really. I mean who is this guy the Majin Buu of Naruto?