Haven't seen Spotlight but, similarly to Argo, it definitely gives off '70s vibes - although it's not set at that time, it seems very much inspired by All the President's Men. Then again, I'll be really surprised if it's as fantastic as that movie, and ATPM didn't win BP.
I still think Joy wins provided it's received as well by the critics and the public as DOR's previous three. If it's more divisive/disappointing, then that opens the door for Spotlight... or maybe The Revenant.