I'm expecting less aggro (i.e. Goblins) and more control, aggro-control, and considerably more combo.
But I disagree with you on your 3cThreshold assessment. For whatever reason, the Germans freaking love Threshold and many of them have been getting better with that deck in the burgeoning Legacy scene over there. The results at morphling.de are a testament to that. Then there are people like Chris Flaaten who have been playing this deck for a long time and will do well with it. [Assuming he's going and that he's playing Thesh.]
Also, a month after being published,
Part 4 of my Threshold primer is still one of the post popular
articles at SCG (it had been 1 for about a week until yesterday -- ouch: it's gone today

, wtf?), so I wouldn't be surprised to see much more of that deck in the event than at Philly.
How it will do is another matter.
On a side note, I'd love to see Tog do well. I've been really pleased with some of my newer lists but I'd appreciate seeing one place well in a large event such as a GP.