I did get a glimpse of SMT in the trailer (albeit a small one). There was a bit of the futuristic underground-Tokyo vibe. Moreover, the cutscene to Tokyo's desolation near the end is screaming SMT and not persona. Maybe this is also a fusion of persona and smt to an extent. Meaning, a transition from Persona, in which there malevolent forces infiltrating modern day Japan, to SMT's post-apocolyptic Japan. Afterall, if you have played SMT you will be familiar with big evil corporations promoting evil...the music industry may be a clever way of given context to how the evil had infiltrated culture and economics through big corporations. This is just a theory though.