On Shovel Knight, I'd really like to see him get in and tbh it feels really weird seeing the sentiment around him nowadays. It's not I think he's all that likely myself but I see him get treated sort of like a washed up has been sometimes. Which is doubly weird for me.
Back during Smash 4 DLC speculation I was the odd one out for favoring Bayo's odds over his, who I thought would get AT status at best (among irl classmates mind you and a handful of other online spaces, not here.)
SK might not be as big as Undertale/Deltarune are right now but I still think it's a great series with a respectable legacy just as a game and an important one in the context of being an indie.
I can understand people getting tired of seeing him in every other indie back then (I did too) but that doesn't really carry over into my perception of a potential appearance in Smash.
I do agree that as far as indies go, U/D has the best shot ( by a good margin,) but I think people kind of undersell other prominent indies like SK and Cuphead nowadays (or always in a case like Shantae.) It's still a very difficult uphill battle, but I think it says something that they actually got into Smash to begin with even if only in minor roles.
On the previous TotK powers topic.
I don't think Recall necessarily needs to be a reflector/counter style move, though I could certainly see that as the route taken for ease of implementation. I think the way to do it though, would be to have it affect items and projectiles exclusively like a reflector but the behavior around it is closer to it's actual source material.
So, let's say a full charge Shadow Ball is coming your way. You can use recall to send it back to the position it was launched from where it then remains frozen in place for a brief period. After that time is up it resumes it's original path like normal. They key difference is that after having been under the effect of Recall it's now capable of damaging Mewtwo.
As for Fuse, I actually grew attached to the idea of using as a "build your own stage hazard tool." So instead of using on items, Rauru could have an inventory of Zonai Devices. Side special would be dedicated to scrolling through them by using the left and right inputs. Neutral special would then summon the currently highlighted device and pressing it again would fuse it directly to the stage or a platform. During the initial summon you would be locked in place while using the stick to control Ultrahand to find where you want to place the device. Shielding or dodging would cancel and drop the device which would remain on stage and could be picked again by using neutral special while close to it.