I agree that releasing a new single soon would be a great marketting move and would relect what Mike wanted to do with the concerts.
I'm sure he wanted to attack the public from several fronts, with a campaign surrounding the concerts (the O2 shows and later a DVD release), a single/album release, lots of merchandise available, even a console game was in the works.
BUT although I am keen to hear new material and would really love Mike to have a new number one single - his first UK No.1 single in the 21st Century - I am also a bit cautious about it. I believe it would have to be the right kind of song, released with the right kind of video. I doubt a video had been recorded prior June 25th so I'm wondering what Sony will do. There won't be a lot of budget for creating a new computerised video featuring an MJ computer figure dancing etc, so I guess they'll be tempted to release a montage video (potentially VERY boring!). If they do a montage, I kind of hope it has elements from TII in it, because at least then we might get to see new MJ footage rather than view another montage of the same old clips.
Fingers crossed that public interest is still high enough to propel a new MJ single to No.1!