Superheroes tend to wear masks. But with a few exceptions, these masks do not cover their heroes' mouths. I get it — people are paying good money to see Christian Bale's jawline, ya know? But in a global pandemic in which everyone needs to wear masks in order to save each other, perhaps some more positive messaging is needed from our friends in the superhero community. The CW, which its mighty roster of DC shows spinned off from the Arrow-verse, has answered the call, revealing several character posters of their brightest and best masked up and ready to breathe …