well, it depends on what exactly you are thinking about when you say "emo." If you go by the full word "emotional," then i would say *prepares for flaming...* that a few of billy's songs have been on the emo side. I mean, look at Soma for example. The whole "i'm all by myself, as i've always felt" line is pretty emotional. Although, in his defense its hard to write a song that doesn't have any emotion in it and doesn't come from the heart. I can think of a few exmples though (RIVERS!

)
However, if you say emo is like Fall Out Boy and Panic! and Hawthorne heights, then i doubt they will go for a song style like that and that most bands seem to follow these days which is just annoying singing for the verse and then screaming during the chorus with no guitar solos. I have to put my full trust in billy that he will write good songs from the soul and hat the pumpkins will have their own genuine sound that he has seemed to find throughout all of his projects.
I guess bottom line is, clarify what kind of sound/music you are talking about when you say "emo."