WWE has locked in no compete agreements with all city-owned facilities for WrestleMania 31 weekend in Santa Clara, California. The agreement states that they would not be allowed to run or host pro wrestling shows around WrestleMania time. They have also locked in deals with large hotel chains. This would prevent autograph and meet and greets as well.
There are indy companies already looking to book around that so I doubt it will stop anyone from running. There is already one indy company booked for that weekend.