i ordered mine in about june... it was when they first put in on the site...and mine also says october 20th but when looking in the order page it says dispach 17th so i hope i get it on the day...i have bought about ten games from amazon and they have all arived on the release day so i wouldnt worry too much bout it.... i have a feeling that it may simply be because of all the changes in release dates, for quite a while the main site said it was available on the 17th but my delivery date was Nov 7th, dont trust the 'estimate' coz thats all it is..