I think my weirdest, most needlessly specific source-accuracy-related take when it comes to Smash is wanting Mario to have an uppercut as his Up Smash rather than a tilt (although I wouldn't argue with a simple uppercut being the tilt and a more emphasized/exaggerated version being the smash). It's not really adding a reference, but changing the context; Since Mario's known for breaking bricks with his fist when he jumps, I feel like his big upwards finisher should mirror that.