Do you think the first shows announced won't be the first ones to take place?

I was thinking, has it ever happened with this or other bands that come back after a long time of hiatus or separation that the first shows they announce turn out to not be the first to take place? Is there a chance they will announce, for example, shows in Japan or South America for the beggining of January? How likely would you say that is? Just guessing, obviously nobody knows