Good games don't always sell well (assuming it will be a good game, of course
).
But Next-Gen are only counting up to April, and HS prob won't be out til Feb/March, so..those sales wouldn't be too bad at all.
I think Sony will be putting a lot behind it. They haven't spared much expense with its production from what we hear, so I doubt they'll let up when it comes to pushing it and marketing it. I'm sure they see it as a key upcoming new franchise.