Diablo III: Reaper of Souls

Only those legendaries (and the two gems) are Seasonal only. Anything else you've heard of should be non-seasonal too, like the new Triumvirate, Ashbringer, Crashing Rain.

I'd expect Dread Iron to be very good in a future patch, when they presumably rework Might of the Earth into a 6-piece, though it does look spiffy as is.
Dead Man's Legacy is a bit... bad when you can run Kridershot + Meticulous Bolts. Guess it's for Arsenal builds (because every other Multishot rune is rubbish).
Who uses Generators, let alone Justice for Crusaders? If they made a Blessed Hammer set, this would be swag though.