I'd hate to be the bump in the road BUT I'm gonna be the bump in the road haha. I don't think Bradley is going to make an appearance in season 4. She was locked in the trunk. Even if she didn't die I don't think she'd be able to get out.
The only way I see this being a possibility is if Norman was dreaming or during the entire blackout he was alone and saw what his Norma personality wanted him to see.
Why at the end of season 3 why did Norman or Norma kill Bradley. In season 4 you should bring back Bradley
Please come back for Season 4 PLEASSSSEEEEEEEE