This. Although I disagree with the blood comment.
WWE won't bring back blood and I don't know what it is with wrestling fans, whereby they can't wrap their heads around this thing called Hepetitas C. Not only are WWE under pressure from "Superstar" Billy Graham whose releasing a tell all book about the company from what I read, but he is also claiming that by inducting Abdullah The Butcher who infected some kid with it they're endorsing blading in professional wrestling. Wrestling doesn't need blading anymore, at least not WWE. Sure, let TNA do it and let Ring of Honor do it, but even they've cut back on the amount of blade jobs being done by performers because its became too dangerous and it makes the industry look bad.
Not saying I've never enjoyed a match with blood, it does create a lot of emotions and in some cases in the past was needed to tell the story, but they see their workers health as being more important than telling a story and the fans that don't understand this are morons.
On the subject of head shots with a steel chair, same as Ricky said. They'll never comeback for several reasons. One being Chris Benoit, two being Chris Benoit's brain, three being Chris Benoit killing his wife and son before murdering himself, four being the entire thing whereby taking a clean shot to the head with a genuine piece of steel can cause a concussion and five Chris Benoit.
Again, some wrestling fans need to get with the times. Blood, head shots; we're not in the 90's anymore, Attitude Era is dead and this shit isn't needed. There are wrestlers dying due to abuse through prescription pills based off them taking these head shots and putting themselves in such danger. Not to mention WWE has a fine for any wrestlers that perform head shots with a steel chair, Triple H struck Taker last year and both were fined, deservingly. Get with the program.