At the current time, there are descendants of omicron variants and subvariants, but we haven't detected any very extraordinary appearances, as yet. That is a scenario for which we're planning ahead. For example, a very distinct immune escape, where vaccines or treatments don't work and it causes severe illness, is one of the worst-case scenarios. We haven't detected one of those yet, but we need to be prepared for the potential.
On October 18th, 2022. See this statement in context.