Everyone seems to assume it's coming here... But this assumption doesn't seem to be based on anything real... Then again, they sell the YZF250X here, so maybe.
I love the idea of this, but I fear it will end up being far too expensive for what it is. It needs to sell for about the same price as a normal YZ250 (remembering that hardly any shops even bother asking the full RRP on them). If it's up around $11k like people are speculating it will be, then you'd buy a Beta 250RR and get a proper enduro bike for the same money.
That said: signs of life in the Jap 2T enduro market makes me very happy. Hopefully Yamaha is putting a toe in the water before developing a new YZ250/WR250Z.
It's a nice dream anyhow...