The following things that caught my attention about the trailer and make me think that the whole mentally ill theory may be right:
- "What is your name?" sequence. This is actually a real psychological technique to 'brain wash' people, it's also used as a trigger to identificate mental conditions, like dissociative identity desorders, by, as you could see, asking again and again to the person to say the name of the personality currently dominating.
- Furthermore the very begining of the trailer: 'young subjects rehabilitation program' and 'psycho evaluation treatment' are obvious indication he was in some point at a mental fascility, probably a derivate for the 'criminal insane' (sort of like Arkham Asylum) or just a goverment experimentation station.
- The tomography brain scan.
- Limbo City, 'in between', not only refers to the place in where unbaptized souls wander eternally but also to the psychological state between 'reality' and 'fantasy'.
-The hair (NOT THE COLOUR) but rather, the style or the lack of it; it sort of look like the standard cut it used either in prision or mental hospital. Uneven and cut hastily (probably to put sensors to monitoring brain activity) it could be just to add to the punk vibe to it but still.
So I really think new Dante scaped from some mental fascility because he is able to see both heaven and hell in the same dimensional plane ( a bit like Hellblaiser/Constantine) and obviously people though he is insane or he really is insane and everything, including his devil persona is all in his head.