He has Brian Wilson....
Unfortunately, I don't envision Brian, if approached by Al, writing and producing a full album for Al. Al would probably never ask of course.
Al seems quite content to just hang with Brian and be there for whatever Brian asks of him. Great for Al, great for their relationship. Not as great for folks who want to see more stuff from Al.
But the solo "storytellers" gigs are a good step. Hopefully we'll see either a live album culled from those shows, or some other recording project from Al.