Reasons Dean Winchester is Batman
1) has died multiple times
2) dead parents
3) awesome fighter
4) trauma
5) adopts literally every child he sees
If you haven’t notice Jeffrey Dean Morgan(John Winchester) played Thomas Wayne(the father of Batman) in BvS: Dawn of Justice. Also, Lauren Cohan(Bela Talbot) played Martha Wayne. Since Dean and Bruce Wayne have the same father Dean is Batman.