No, this isn't an announcement.
So I was on another forum, and we were discussing the possibility of another sequel for FF7.
Personally, I don't think there's going to be another one, mostly because of the fact that it's been 5 years since Cerberus was released, and there's been nothing. Usually when these things start happening, Square give out hints, like the did with FF13-2.
The secret ending showed that Genesis was back, so that seems to suggest that something else will happen. I'm not sure if Genesis is evil after the ending of Crisis Core though, it seems to me that he only wanted the Gift of The Goddess, which he found to be his pride as a SOLDIER.