So, I've seen a lot of discussion about whether or not Adolin would end up being a Radiant. At first I thought that would be just a little too cliche, especially with the rest of his family, but then I started thinking about the Shardblade he already has, and I started wondering... would it be possible for Adolin to actually bring back the spren in his Shardblade? He already shows it an incredible amount of respect, and thinks of it to some degree as an actual, sentient being (talking to it before duels, refusing to give it a new name, etc). I know Kaladin and Syl have already talked about whether or not you could bring back a "dead" spren, but as far as I could tell, nothing conclusive was decided.
My brother is convinced I'm wrong, but as I'm currently borrowing his copies of the books he can't disprove me. Thoughts?