It's a memorial for a real person. If you've been to the
Sons of the Storm website, where a few of the more well-known Blizzard artists show off their work, you'll see that one of them is called "Twincruiser." This isn't actually a single person, but rather the twin brothers Michael and René Koiter.
Last year Michael Koiter died. The shrine was placed there in remembrance of him. If you look on the front of the monument, you see what looks like some runes. Look closely and you'll notice that the two in the middle are actually his initials, MK.
It's really very touching once you know why it's there. Even more so when you see it from this perspective:
If you're interested, there's a memorial written by by René Koiter at
http://www.sonsofthestorm.com/memorial_twincruiser.html