Nicolas Petton announced on the Emacs-Devel list that Emacs 26.2 RC1 is out. If you verify Nico’s signature—as you should—you’ll notice that GPG says the key has expired. As Nico explains, the key is still good but the GNU keychain has not been updated. You can safely ignore the message.
I compiled and installed it on my Mac in the usual way without problem and am using it to write this post. The installation is brand new so I don’t have much experience with it yet but so far everything seems excellent.
As usual, thanks to John, Eli, Nico, and all the others for their work in bringing us this release.