Rey Mysterio is currently in Milwaukee, Wisconsin. Of course, that is the site of tonight's WWE Elimination Chamber pay-per-view.
Mysterio will be appearing today from 2-4 at the Milwaukee World of Wheels convention at the Wisconsin Expo Center.
As of last word, Rey was not ready to return but it's likely he'll be backstage at the event. Mysterio was also backstage at last week's RAW TV tapings.