The 2021 Worldcon, DisCon III, announced on February 19, 2021 that they have removed Toni Weisskopf as Editor Guest of Honor and that they do not plan on adding additional guests of honor.

The World Science Fiction Society (WSFS) does not have a Board of Directors, Chair, President, or any other executive authority. Nearly all authority regarding Worldcon, including guest selection, is vested solely in individual Worldcon committees. Each Worldcon committee is selected by a vote of the members of the Worldcon two years in advance. Worldcon committees are independently organized, and under the provisions of Section 1.6 of the WSFS Constitution, all matters regarding an individual Worldcon not explicitly defined in the Constitution are reserved to the individual Worldcon committee.

If you have any questions about DisCon III, contact them directly through their web site.