I haven't seen any promotion in the UK, except for a very brief segment on 'the one show'. They appeared to have officially released footage, rather than an internet clip, so I guess Sony were behind it but there wasn't enough information in the clip.
I'm sure there will be SOME promotion between now and the end of October but as somebody else said, but as frustrating as it may be for the fans, don't expect there to be much. The length of time this release is allowed to run for is being capped by Sony and so as long as ticket sales for that two week period are good then Sony will be happy. Theymay even extend the run by a week, but With such a short run, nobody should expect Sony to put much money into promotion because they are a business and won't want to waste money. BUT I agree that the marketing campaign for the DVD release should be huge - that is where the money really is! I'd be disappointed if we didn't see billboard posters, magazine adverts, TV adverts for the DVD (and possibly CD) bet
I believe Sony want a good solid run at the cinemas with huge demand and good reviews so that they can use hype to sell the DVD in December.
The main thing that concerns me is that the general public perceive this release to be a success. It's important to me that (even though he is gone) 'This Is It' is a 'comeback'. I know many people have rediscovered Michael Jackson and I know that people feel a void since he left, but I want them to feel as though he COULD have made a successful comeback. Before he died, many people were saying he was too old. They said he was passed it. They said he wasn't rehearsing and wasn't in shape. I want the film to show that he WAS really working for this and that he could have done it if he hadn't been taken.
I believe that Sony will realise the public need to see this as a succes and I believe they'll hype the theatrical release's success to make sure the public perceive it to be a success in order to sell millions of DVDs in the run up to Xmas!