Despite being a wrestling fan for about 35 years, I really doubt I'd make a special journey to visit one of these(obviously if it was 30 mins away from home, that might be different, but chances are it would be in London, no doubt). I might plan a weekend away where I incorporate this along with a show, a night out etc, but not this on its own.
The big issue for me would be that knowing how WWE operate, it would either be a WWE exhibition, or a wrestling exhibition with out WWE. I'd want to go and see things from the Hackenschidt days, the US territory days, World of Sports era, Japan, Mexico as well as WWE and WCW. Basically I'd want to see a proper wrestling history exhibition.
As much as I love 80's and 90's(and very early 2000's) WWE and WCW, Im not sure it would be enough to get my juices flowing.