2/3 of them are references to

Sonic's Concept and is also a Skin in Sonic Superstars Cream's Debut (Though inconsistent looks)

A former 90s rival's (A red capped plumber guy) recent 3D platformer since 2017

The Egg Walker's comeback

Giving the character's Icons some polish.

(Will be in the next update)

(Silver Update)

Another Trap attack + A returning move from Infinite Battle + And another intro

That Hover Move.

It's like the OG game but less stiff.

Act Music as Rounds? (may not apply to every stage)

(Not finalized yet but its a resemblance.) I have decided to make it 3 Buttoned. Though the Basic attacks mapped A,B and C buttons will also be mapped to X,Y and Z

(coming some time soon or something.) The 1st Sonic Battle Redux arcade Run: Sonic.

The "Big Green Man" (Guest) teaser.

Silver (With A Counter move with a cost of Power) and Metal Sonic