Yara's a newbie and hasn't even taken the Wonder Girl name yet, let alone Wonder Woman. Donna would make much more sense at the present time. Jackson makes sense though since he recently upgraded from Aqualad to being a second Aquaman, just like how Jon became Superman, plus he was the one shown to have Andy as a sidekick (Aqualass) in Future State prior to her becoming Aquawoman and joining the League. And it's true that there's nothing preventing Jon, Jo, and Jace being there. It just can't be the exact Future State roster.