Well then if that picture is accurate and the runes are from all 3 games i wouldn't be surprised if they whip out news on all 3.
I'm a little skeptical about how good a Diablo 3 game will be received. It will depend a lot on how much they stray from the other 2. If they go 3d it could do as badly as Hellgate: London did. After all that game was from the makers of Diablo iirc. I think its just the name that would carry it in sales tbh.
As it is Starcraft 2 seems to be more of the same. But I'm still going to check it out. And of course I'm also going to pick up the wow expansion.