New Block Called Cap Fungus/Capped Mushrooms

This is a block that was supposed to be added to the game a couple years ago with the Wild Update, as seen in the concept art of the new Birch forests. I understand that they canceled that part of the update, but it doesn't mean it will never happen! That's why I think it'd be great to add Capped Mushrooms (its real life counterpart being Cap Fungus) to the game. These should spawn on the side of Dark Oak trees in the  forests as mushrooms prefer the darkness anyways. But, it doesn't matter which forests they would spawn in, I just think they'd be great to add details with in our builds!