Things have been a bit chaotic lately over at The CW with Arrow announcing it's coming to an end quickly followed by Supernatural, which we all just assumed would outlive us all, doing the same. Luckily, Legends of Tomorrow thrives on chaos, and a new mid-season 4 trailer demonstrates that the Arrowverse's weirdest, wildest step-child is as delightfully insane as ever. Some very important things to point out over the trailer's packed two-and-a-half minutes: Caity Lotz's Sara Lance and Nick Zano's Nate Heywood dressed as Supergirl and Green Arrow, respectively, …