If he does end up dying (either due to the same god-tier AIDS that sent both Itachi and Kimimaro to their premature graves or by Momoshiki/Kinshiki), I hope that he gets some decent screen time prior to it. I don't think I need a mini arc with him and Boruto (though it would be sick) but I would like to see at least a single episode with him front and center of it because to be honest the entire aspect of Naruto: the Last that dealt with Toneri was pretty awful and even broke the canon continuity by the end of the film. It seems like they have something interesting for Toneri to do in Boruto, but so far he's had about as much dedicated screen-time/plot progression as Thanos has had during the post-credit scenes of every Marvel movie since the Avengers.