Some information regarding the Wembley shows, and particulary July 16th, from member go flying who produced/recorded/mixed the audio of the July 16th show we are getting on the upcoming DVD and CD releases. This is from 2009 on the gearslutz forum.
"I can only speak for the Bad Tour period where I recorded and mixed two Wembley Concerts (July 14th & 16th 1988) to multitrack.
Yes, Mike SANG pretty much everything - even toward the end of the show on the 16th (which was the third-day-straight-in-a-row show).
I listened to those mixes again recently after having put them away for over 20 years - my first reaction was 'omg this is wonderful' as the hairs stood straight up on the back of my neck, 2nd thought was 'thank god I didn't screw up'
Mike's performance on the 16th was way so markedly way beyond that of the 14th, and any other concert of his that I've heard from around that period (Dangerous tour included) - perhaps it had something to do with Lady Diana being there that night - he was obviously very happy, laughing and playing with the audience - it seems like it was a very special event for Mike and he most certainly sang his heart out.
The Bad Wembley recordings were commissioned to record concert audio for the Around The World documentary which was scheduled to be simulcast (simultaneoulsy released to air) on NBC, BBC, NHK and other broadcasters later that month on July 29th (I think).
I was told that whilst video for the documentary had been shot at a number of concerts throughout the tour, Mike felt that the audio thusfar, for reasons never elaborated on, was not up to scratch, so I was asked to record, mix and then sync snippets of audio to the documentary video master. It's a longer story than I have time for at the moment unfortunately.
The audio is of very high quality indeed (but then of course I would say that lol), having been recorded to Mitsi 32's. The multitracks were mixed with great care and 'honesty' - you guys who have worked on live concert recordings will know exactly what I mean by this.
In answer to your question, I don't actually know whether video recordings (suitable for post-production) of Wembley exist.
In the realms of supposition, I'd imagine that the IMAG (nocturne prods) video produced each night was fed from video mixer output (used to feed the giant screen, and that the seperate camera feeds were likely not recorded discreetly however I may be completely wrong on this.
Patrick Kelley, who directed Around the World, did have a 7 man camera crew working on the 14th (this was in addition to the giant screen video crew) and some of that footage was used in both the 'Another Part of Me' video (which used footage from Wembley 14th and also Paris) and was also used in the Around the World Documentary.
Patrick's crew were using in-cam recorders but I seem to remember they only recorded the first part of the show on the 14th
Nevertheless, even if matching video does not exist, it would be a great pity if the wembley recordings were never released - the outstanding quality of Mike's performance on the 16th imho cries out to be heard - only the estate could tell you if and when " (Gearslutz 2009, one of the engineers from Wembley)