http://www.rawstory.com/2015/11/hacker-collective-anonymous-claims-isis-has-plans-for-more-attacks-on-sunday/
Now, this data isn't 100%, it's anonymous after all, but imo, it is better to be safe and sorry so I think we should help get this out there.
Also, from: http://www.wrestlinginc.com/wi/news/2015/1121/604046/isis-planning-attack-at-wwe-survivor-series/