For anyone planning to watch the DR3 anime: do as people tell you and intertwine the two arcs! Watch Future ep 1, then Despair ep 1, future ep 2, despair 2, so on and so on... Then the Hope episode at the very end after you're done with both arcs.

I was actually dumb enough to watch them like every other anime and got exposed to half the big twists prematurely. >_> Don't be me!