#1 Why was Big Show Drew McIntyre's first title opponent?

About 20 minutes after WrestleMania 36, Drew McIntyre had an interview with Sarah Schreiber which was interrupted by the most unexpected legend - The Big Show. The former WWE Champion did less congratulating and more provoking.
McIntyre rightfully refused to face him at first after his 4.5-minute war with Brock Lesnar, but the legend had provoked him enough to immediately put the title on the line and the main event of RAW was essentially a dark match at WrestleMania.
Breaking Vince Russo and Jim Cornette update HERE.
It's a bit of a crazy situation and many have been wondering why The Big Show was sent out to challenge for the WWE title. The answer is simple. He has a show on Netflix coming out today called The Big Show show and in all likeliness, the match was done to promote the series.
It was just a throwaway match with no actual consequences. We wonder who could challenge Drew McIntyre going forward. Hopefully, it's a more interesting name.