Then we can just make one. You seem to be implying that a new tier requires some special intervention from the community to be put into place, whereas in fact we could just give it a name, put some Pokemon in it and nobody would be bothered in the slightest. It is not a question of officiality as there is currently nothing official about NU anyway.
I'm not convinced by this, mainly due to the lack of Stealth Rock. With it I'd probably agree, as many of the decent walls are crippled by it, at least those with reliable recovery, but without it those walls could very well benefit a lot more than any of the more offensive Pokemon. With a strong defensive base of say Bastiodon/Magcargo + Tropius + Whiscash + Xatu or Chimecho for Wish support there is plenty of potential for switching around and walling teams, which is made so much easier if your constant switching goes unpunished. There is also the fact that preventing a sweep from a problem threat is so much easier by throwing a random Sash on something for an easy revenge kill, safe in the knowledge that it won't be ruined upon switching in.
This is all just speculation right now of course, and it is likely that the starting pool of Pokemon will be much greater than that initial list. Whatever NU ends up being, I'll be eager to give it a try.
