Ouch! Did something similar with mine when I dropped a ladder on it. It will come back with a little TLC. I used a large Crescent wrench and a pair of Vise-grips to gently pull the bracket back into shape. Set the lid on a pad on concrete and use some shims to protect the jaws from gouging the finish.
You could try tapping it back with a rubber mallet, but could pop out some of the enamel.
Tim
My teammate placed the lid on his BW while we were about to rotate the meats. I was putting gloves on, and as we both approach the pit from the corner of my eye I see the lid fall. It fell on grass so I didn't get too worried, until I picked it up. It was an accident, but I'm sure y'all know how it felt.
It is still useable, I was going to leave as is. I'm afraid I'll try to fix it and break something else....