Youre all mentioning harcore raiders getting bored soon, ill be honest.. my guild is 4/13 HC and ranked about 220 in the world in 10 man rankings.
We are not even close to being bored yet, working on bosses and stuff.
Perhaps this 4.1.0 is gonna be like when they released Shattered Sun area, where u needed progress to open stuff up, and then eventually Sunwell opened.
Cause atm i dont really see the need for a new raid with Tier12 items in it. Most people arent even close to being fully HC Tier 11 geared.
A new BH boss sure i can see that happening, and a small raid aswell, but i dont see T12 coming in 4.1.0 unless its 2 months away.