Rule 1. Never listen to rumours
Apparently he has other business commitments, so his visit is delayed by 2 or 3 weeks. Nobody has yet suggested that "The Opening Parade" will be postponed. Police and security seem to be getting more vigilant.
Also, Prince Charles and Camilla are apparently coming to Egypt on about 19th November. So a late birthday present for him?
Putting 2 and 2 together, it is possible that everything might fall together towards the end of November.
Alternatively, there may be no truth in some or all of the rumours.