Player icons miss out some amazing characters?


Scrolling through the Blizzardnet icons and I see all Overwatch characters, multiple deathwings and two DVAs and two Junkrats. Thinking ‘wow, there are so many! I want mine to be Alexstrasza!’
yet…after multiple searches, i find no Alex.
I suppose I’m just extremely confused at to why there are multiples of some characters, but none of some at all? For eg., Alex has been in both WoW AND HotS. Is she not important enough to be added…?