Cena v Fiend for the title maybe?Meltzer now reporting that Cena vs The Fiend and Goldberg vs Reigns are locked in for Mania 36.
He didn't state which one was for the universal title though.
He could just have built around Reigns like he did Hogan, Austin or Cena but he never did. Vince likes Reigns but he has never trusted him enough to be the guy. His changing 31 and 34 main event results and the drug failure for a pretty minor offense suggests that. The 3 previous mentioned guys would never have experienced that.
How would Fox know who would potentially 'draw viewers'? Goldberg outside pro wrestling didn't really create a big legacy and his peak in wrestling was 22 years ago. Lesnar, Rousey, Rock and Cena Fox would obviously know because of their success outside pro wrestling
Golberg vs Reigns does not need the title and Reigns will be booed out of the building like he normally does. The Goldberg jobbing tour continues obviously.
I dont believe your second paragraph. Vince only sees Reigns as his top guy. All Wrestlemanias for the most part are built around Reigns (ME matches with Lesnar, Triple HGH, etc). Yes he changed 31 and 34 because he realized that Reigns wasn't over enough with the crowd.
Are we supposed to believe that Fox does not have the minute by minute details on who draws and who doesn't? Media companies especially the ones with linear distribution are very well aware of overall viewership and they no doubt share this information with their content partners.