Oh, I'm pretty sure it will go gold. This is a big deal for STP fans, and surely there are at least 100k of us!
However, anything can happen. If the record isn't promoted, then it won't sell---and I haven't seen *any* promotion for it, except for on-air interviews and the Kimmel performance (upcoming). Now, I know they must be promoting it somewhat, somehow, but it's troubling to me that I haven't personally encountered any of it. That suggests to me that they aren't promoting it nearly enough, and that may spell bad news for the future.
That said, I prefer to think positively. It's STP, after all! It will be fantastic, I'm sure.