I updated my predictions for the possible Legendary Duelists I think will come in the next 12 months:
Note: Every prediction has a margin of error:
Tea Gardner (DSOD) (Late June, Gate)
Neo-Spacian Aqua Dolphin (Early July, Gate)
Leon von Schroeder (Mid July, Gate)
Dark Diva (Mid September, Gate)
Yuma Tsukumo (Late September, ZEXAL World Introduction)
Reginald "Shark" Kastle (Late September, ZEXAL World Introduction)
Tori Meadows (Late September, ZEXAL World Introduction)
Flip Turner (Late September, ZEXAL World Introduction)
Astral (Late September, ZEXAL World Introduction)
Aigami (Late September, Life Time Bingo Mission)
Anna Kaboom (Late October, Gate)
Serenity Wheeler (Mid December, D.D. Mansion)
Bronk Stone (Early January, Tag Duel Tournament)
Marik Ishtar (Early January, 4th Anniversary Lifetime Event)
Cathy Katherine (Early March, Gate)
Jim Crocodile Cook (Mid May, Gate)
Dark Signer Misty Tredwell (Late June, Duelist Chronicles)
Nice list!
I'm not convinced by Aqua-Dolphin since there are more interesting humans to add in GX
For the 4th anniversary, I rather see String (DM). We could get another skin of the Egyptian Gods (we already have 2 versions of Râ) and like that the Marek team will be complete. Also it is one of the last character from DM out of fillers, with Duke, Salomon, Serenity and Panik.