Dude I would have noticed if it was there. There are only so many heroes you can choose from each week without paying for them.

Edit: I'll concede though that perhaps they might have screwed up somehow by perhaps wrongly removing it from my "paid heroes" options (and had it greyed out) or removed it for that one week when I decided to play the damn game again. Either way, I'm pissed off about it and I won't be spending any more time on that game. Dota 2 is so much better than HoN now and the report system actually works.