I agree the addition of a specific blurb for LOTR and it expressly stating "highly detailed sets" indicates that lego is going to be producing items for the "Theme" LOTR. regardless of if its a brickheadz or something else.
The point being the OP was just speculating that this information as subtle as it is gives us hope that their will be more to LOTR then just BH... maybe no more then the D@C but it gives us hope.