A James Gunn's 10-month old post has resurfaced online:
Source: https://bsky.app/profile/jamesgunn.b.../3ju2ualgyic23
Date stamps? You can click on the view post button after "Originally Posted by Last Son of Krypton" in the quotes to read the original discussion (it's from early January 2023).
Cameos/extended cameos/supporting roles is kind of the same.