Actually, my interpretation was a bit different than the common one I'm seeing. I thought that the real Naruto was just then returning from his encounter with Itachi, and saw that Tobi had met with the other Konoha nin. This would explain why he had the "insight" to set up a clone and strike from the shadows: he left the clone there for recon purposes while the real Naruto and several other clones spread out. When he came back, the trap was already set. At least, that's what I figured.

It seemed like Tobi was really taken by surprise, but was either still able to dodge it, or maybe his body isn't affected by attacks. That's probably the most intriguing of all the battles set up. We've seen enough of the Jiriya/Pain fight to know what it's about, we know the majority of Itachi's and Sasuke's moves, we know Suigetsu and Kisame enough to know their styles, but Tobi is a complete mystery. Well, we know he has Sharingan, but there's no telling what kind of powers he can use with it. I'm excited. I can't wait for the next chapter.