The 8.3 embassy arrangements and allied race UI strongly suggest otherwise.
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I agree, it kind of sucks that allied races (at least, the older ones) are being left in such a bare-bones state while some races are getting like 40+ new options.
And yeah I don't expect that gilblins will be an allied race at this point. Just wanted to mention that they're set up in a way that allows them to be.
As for Calia there's specific storyline threads where she talks about the undead needing someone after Sylvanas' betrayal of the Horde, so its already implied that she will have an affiliation with them.