Since he’s not named (it’s him though… see the image below) and is in only one panel many collectors will likely consider this a cameo first appearance rather than a full first appearance. Xizor’s story in legends is very connected to story after the Empire falls. To me this is more evidence that the comics will be moving past the destruction of the 2nd Death Star sooner than later.
Then we get this…
Iden Versio and Inferno Squad!! If you don’t know who they are be sure to open this post in a new tab and read it next. But Iden Versio, Gideon Hask, and Del Meeko are some of the main characters in Star Wars Battlefront II (and prime candidates to show up in a Mandalorian Era show in my opinion) that are very popular characters.