This would be especially prudent for Arrow, which has a lot to tackle between this epic team-up and its 100th episode.
Aliens begins Monday, Nov. 28 with Supergirl at 8 p.m. EST on The CW, and continues with The Flash at the same time on Tuesday, Arrow on Wednesday, and Legends of Tomorrow on Thursday.
It is the show that’s been granted the least amount of extra time, though, so it’s just as possible that the Arrowverse shows are squeezing in a little extra content along with their mid-season finale sneak peeks.