Elaine Low Senior TV WriterKicking off its upfront day with an action-movie parody featuring Aidy Bryant, Kenan Thompson, Seth Meyers, Jimmy Fallon and others rushing to make it to the (ultimately virtual) event, NBCUniversal showcased its wares for the upcoming TV year by spotlighting streaming service Peacock to a nation emerging from the past pandemic-ridden year.The event got underway hours after the mega merger of Discovery and WarnerMedia was formally unveiled to Wall Street, sending