It's a rumour, It's not confirmed

I heard that that rumour was proven to be fake. but, i still believe there may be another kind of miiverse replacement, my theory is that the C button stands for "community" and, when you press the button, it takes you to the community of the game you are playing!

Yeah, it's false

nintendo doesnt want to spend money on moderators for a service like that, sadly, i hope they come to their senses