Yeah the fact that they're hyping it up makes it seem like it won't be the perfume, but a VERY tiny chance of it being anything else is holding on imo.
On Twitter/baidu it looks like guesses are mostly perfume or new song.
One thing that is weird is that they just used the same shot for the un/deux so why do a new one for this one? Some think that it's because it's for men and women so it got a new shoot. She mentioned a bit about it on TA during a Q&A.
avex China also posted about this on their official Weibo. Seems that is making people think it is not perfume.