@ronderick and all
do you think there is a chance that canon announces new body/lenses in this expo? I mean day 3 or even the last day,,
That is not how Canon or other camera companies announce major new cameras or lenses. They send out invitations about two weeks to news reporters inviting them to a press conference which is held 2-7 days before a major event. They do not just show up with a major new product. Canon wants the free publicity, and their booth in the event will have a big display covering new products.
Its those invitations that are leaked. The invitations do not say what product will be, but it is known at that time that a major announcement might be made. Sometimes its just a new printer or scanner.
There were no invitations to such a event!