Gnomeregan Theme on new login screen?

[fechter 0]

So I was just waiting on the main menu in HotS, and since the patch there is the new Zul'Jin background. Suddenly the theme for Gnomeregan, the starting zone for the gnomes in WoW, started playing. I am 100% sure that I heard it and that it was that one.

Anyone else heard it? Could this be a teaser for Gelbin as the next new hero?

Edit: Okay, my brother just heard it too after waiting in the home screen and he recorded it.

Here's the video link:

 

Edited January 5, 2017 by fechter
Video added

[stuyjcp 3]

This theme was added to the game upon Chromie's release, and was the theme that played when the game was launched while Chromie was the Nexus' newest hero.