As well as the QS reissue, Phil also mentioned in a recent interview with Prog magazine that 2026 will mark the 50th anniversary of 801 Live and that there will be a reissue including some previously unheard material.
Given that the deluxe 2CD issue of 801 Live included the rehearsal sessions, I'm eager to find out what the extra stuff might be (all I've ever heard is a bootleg CD-R of part of the Reading Festival set, copies of which I've sent to Phil & Bill in the dim and distant past).
I think we can rule out anything new recorded by the original members (as per the QS plans), though... When I mentioned to Eno in 2016 that all members were still alive, he left me in no doubt where I could stick the idea of them playing together again!

Since that time both Francis Monkman and Lloyd Watson have sadly left us, of course.
I don't know what other plans Phil may have, but he had talked about the possibility of another boxed set to include his many and various collaborations (which might, of course, include, QS, 801, The Explorers etc.). Time will tell, I guess...