Tails Content
This is just a small thing, but I wish I had the money to commission/pay people to make Tails content for me and every other Tails fan out there. Given their track record I don't trust Sega to treat Tails better and give him what he deserves, more spotlight, better writing, his own modern game, and actually utilizing even a part of his full potential, so I think it's going to be up to his fans to make some good content for the twin tailed fox.
I wouldn't care if Sega got mad. I'd just have it finished and then shove it in front of them and tell them that this is how they should be treating Tails and how good he actually can be. When more and more people see how cool he really is, then maybe he'll get more positive attention, and that will snowball into even more good content with him.
But, just a dream right now. I hope someday Sega will actually utilize their best, in my opinion, character and let Tails shine. I'm not holding my breath for that though.