If I remember right I'm sure there was a GameCube controller that had a see through bottom half years ago.
The Pokemon sun and moon rumor may be true. Cos they have been leaked a day before the direct by (Nerd Leaks) I found it on techradar.
Yes and the only other problem I can think of is that the GC used memory cards to save data. The only way that could be possible on the Wii U is to use sd cards instead and add support for GC controllers on the vc or they might remake more GC games like they've done with Zelda: tww & tp. Some GC games also got remade for the wii such as Pikmin 1 & 2, and the Metroid Prime trilogy which is on the vc. Or they might release them for the NX.
I can't see them releasing a switch mini without the joy cons cos you need to remove them to play games such as 1-2 switch and even if they did they would be so small to hold in most people's hands. I think it'll more likely be a 3ds successor. That's more important cos the switch is missing some features the 3ds had such as 3d and a camera.
Or even a upgraded switch.