The easy thing to expect, given its preview, is that Sadie’s Song will be about Steven helping boost Sadie’s confidence to perform at Beachapalooza. She certainly displayed some element of stage fright when she realized Steven was watching her sing, at least.
Even if that route is taken, though, where they go with it from there is anyone’s guess. Will this be another episode that touches on Sadie’s relationship with Lars? It would be great to get a Sadie episode that didn’t involve Lars, but will we?
Maybe, just maybe, Steven could fuse with Sadie. This is a long shot, since Stevonnie is a symbol of Steven’s excellent relationship with Connie, so they’d probably only go down that road if they wanted to take Steven’s friends-with-everyone trait to the next level. A fusion is, however, proven to be the best possible ending to a performance, so keep that in mind. 😉
We doubt Sadie will have to defend her title as deadliest pure-blooded human in Beach City by taking down another Gem monster, but if she had to (got to?) we wouldn’t complain.