This pretty much sums it up

https://m.youtube.com/watch?v=DaOgZwk9rN8

Will they release that game where we get characters like Sally, Ground, Scratch, Breezy, RObotnik Jr,
along with there adjacent stages/worlds? Nope
Will they release that NDS, 3dS, Wii, stage variant ? Nope
Will they actually Just forget 3d ( SA ) Sonic and allow us to play a scenario with 2d ( MD ) Sonic ? Nope.

Shadow is basically the Modanna Sonic that was canned and we got in the order Amy -> Sally -> Tails
and so forth. That is what this is really about. In fact we could reskin this entire game ( mod/hack ) and
just do Sonic and Sally and the Badniks. No SA Sonic, No deformed nonsense. Everything fun and happy.

But then again having to sign a $R#$#@$$@ agreement in grade schools is when this world got lame.

Same with

Double Dragon Advanced
Rockman Zero ZX Playstation collection
River City Whateve...

Are you kidding me ?