I just hope whatever Brandon does with this storyline, he doesn’t just turn Adolin into a plain ol’ Radiant. I kind of like that he is the “mortal” one of the group. There is opportunity here to do something interesting.
Just spit balling here... what if... Maya returns to sentience because of Adolins constant love and attention. Since he was the one making the overtures, in essence, Adolin is the “Spren” who bonded the Radiant. So what if Maya becomes a Shadesmar “Radiant” (I’m sure her awakening in Shadesmar will be a big deal amongst the rest of the Spren), and she has the ability to summon Adolin to Shadesmar and Adolin becomes a weapon when materializing in the Spren world.
I realize that’s pretty unrealistic... even by fantasy standards. Just really hoping we get something clever and that they use the unusual nature of a Spren rising from the dead as a way to differentiate Adolin from the KR’s not just make him another one of them.