They haven't announced ANYTHING for 8.3 yet, have they? It does seem strange that no new allied races have been announced in over a year, but it seems they're holding their cards close to their chest for 8.3 and beyond. So they totally could be coming fairly soon despite not having been announced yet. I personally expect them for 8.3.5 or the next expansion's pre-order. Or maybe for the 9.0 prepatch when Tinkerers are introduced (lol).