I honestly see this going one of two routes.
Route 1: The Pessimistic Veteran Route - The requirements for these events will be harder than current legendaries and journey type events, but not epic confrontation requirements. Unlocks like a legendary character and requires G12+ for a 5 star unlock and R5-6 for 7 stars for the average player.
Route 2: The main emphasis of the whole Journey Guide thing is to make it easier to guide new players and help them access fan favorite character found in the legendary/journey event. CG may be expecting an influx of new players based off the hopeful success for Rise of Skywalker and these two Galactic Legends characters are meant to help them with the game. Maybe they unlock at 5 stars doing the new Quest accompanying the system, but it takes them awhile before the 6-7 star unlock.
