Yes, I understand your points. They're fairly common sense and it's probably good that you point them out so someone doesn't get wishful thinking. Trust me, I didn't make my post with the thought that it would actually come to fruition. I didn't know this thread was meant for only 100% scientifically credible Sonic alternative costume ideas
I wouldn't say your post was really trying to crap on the idea as much, but it did seem you maybe didn't fully understand that I was referring to Sonic 2 Tails, which I thought would fit the 'retro' style.
I realize my idea would likely never happen, but one can dream, right?
Sorry for my stupid idea. Please continue.
P.S. I had read that article, and from my understanding of it, my idea is still somewhat plausible because he'd be identical to Sonic. Whereas Lucina was supposed to originally be an alternate costume for Marth, they since made them slightly different and she got her own slot. Tails would be identical to Sonic, from my idea, so it would still work. But of course, it's still very unlikely to ever happen, and you make good points.