With the CW's Arrowverse's three-night "Elseworlds" crossover less than two weeks away (The Flash "Elseworlds, Part 1" airs Sunday, December 9; Arrow "Elseworlds, Part 2," airs Monday, December 10; and Supergirl "Elseworlds, Part 3," airs Tuesday, December 11), LaMonica Garrett's The Monitor/Mar Novu looks to be the catalyst for Dr John Deegan's (Jeremy Davies) reality-altering ways – but everyone has their good[...]