I do not have access to real-time information or developments beyond that point.
It's important to note that circumstances and personal preferences can change over time, and public figures' decisions are influenced by various factors. If there have been any updates or statements from the Sussexes regarding their involvement in future events, it's best to refer to more recent and reliable sources for accurate information. News outlets and official statements from the Royal Family or the Sussexes themselves can provide the most up-to-date insights into their plans and aspirations.