they said in 2.7 they would release a new tier of gear.
I'm well aware. They wouldn't add a new tier for 2.8. If they added a new raid on top of 2.8 it would have to have either a new tier of gear, give the same gear as nightmare, or only give lower tier pieces. All three of those solutions are not optimal and would induce some form of rage.
2.7 is NiM DF with a new tier of gear, maybe with a new type of comms and comms gear. They're not twasing anything about 2.8 except for GSF and NiM DP, but they are adding a new story in 2.7, so 2.8 might have a brand new Op, too.
Fingers crossed for you hardcore raiders.
refer to above.