Yes we can. Because
1) Joaquin Phoenix’s acting and his done this kind of movies before where main character suffers from mental illness.
2) completely different storyline from Heath’s Joker
3) Will send a message to audience about Mental health awareness.
4) will be free from shackles of DCEU
5) Detailing, symbolism and Cinematography of trailer.
All these and much more aspects of this film shows it is Oscar worthy.

Yes but only if it gets nominated after so much discussion on its resemblance to high school shooting incident

Yes it can get oscar.by acting,story and all

I don’t think it’d be given oscar as a movie

Joaquin Phoenix may win for acting