Mystery Fallout character is said to be returning according to McQ

McQ has stated on the LightTheFuse podcast that a character from Fallout would return as an Easter egg in pt 1 and will return in pt 2. All signs point to Sloane (Angela Bassett), Lane or August Walker (despite being dead). If it were Walker then It could be a flashback showing that he could have been part of bigger picture than Hunt and and his team had ever known or the most ridiculous one someone was impersonating Walker and was wearing mask, but I can rule that one out as those were real acid burns during his fight with Hunt