As for the runes on the icy image the previous were: the World of Warcraft: Wrath of the Lich King's Frostmourne rune, followed by the Hel Rune from Diablo II, and the protoss Alkilae tribe symbol from Starcraft II. Today's rune seems like a solar system. This is not a symbol you see often in a Blizzard game. The only thing that it resembles is an Arcane Sanctum from Warcraft III.They go on to talk about the The Valenzetti Equation, in a very weird version of NotPron!
Otherwise it can be interpreted as three franchises and a new franchise at the center (4 orbs). Or Starcraft Galaxy? Those staring eyes in the splash page look a lot like a Dark Archon -- and if you have been reading Starcraft: The Dark Templar pocket book you will know that Ulrezaj the Dark Archon has returned to Aiur.
In more WWI news *insert another World War One joke here* Blizzard will be streaming the opening and closing ceremonies as well as some of the tourneys and concerts, so don't miss out!