couple pages before the end obito was saying some shit like he's seeing things. couldve been that zetsu exoskeleton making him see things too
That's Obito seeing through kakashi's eye
that explains the kamui
ya he must have decided to hide his MS for 16 years for shits and gigs
Kakashi and Rin might be zetsu clones. Didn't Zetsu say their were Mist ninja's? and its only Kakashi and Rin there.
That set up to control Obito... 
This. So obvious that it hurts really.
What if Rin is still alive?
Then Kakashi probably wouldnt have said all his friends have died, and would have said something when Obito told him why he changed.
smh at all your interpretation levels