So I went and photoshopped a high elf onto what I am predicting what the updated Night Elves (might) look like. I'm using the Illidan model from WoE as a base.
With some clever retcon I think it would be possible to pass off High Elves as more built and muscular than Blood Elves, they don't look too awful in my opinion.
Also I noticed that Illidan has shorter legs than current Night Elves, I had to shrink the player model legs by ~15% to proportion it to Illidans. Just something to consider when we see the update.