I see it this way.
- It can't be anyone (including Sai) from Team 7 -- obviously.
- It can't be anyone from Team 10. They get the most hype outside of Team 7 and they have a freaking formation named after them, "Ino-Shika-Cho". They also receive earrings from a Sarutobi when they're promoted to chunin.
- It can't be Neji. He's the only jounin of the 11. He got to show off some of his skills versus a 30% Kisame clone. He got screen-time in the war with some solo panels.
- It can't be TenTen. She got to use the legendary so6p's fan in the war -- nuff said.
- It can't be Hinata. She's in love with Naruto. <<< See that, that says Naruto (main character), nuff said, "she's in", but I'll carry on..she got some shine in her "scrap" against Pein and she was rescued by Naruto in the war.
- It could be Kiba, but it's not. He got a panel in the war with the great Neji. Lol, no, hasn't he been shown here and there in part 2, effectively using his tracking abilities?
- It could be Shino, but it's not. Shino WAS my choice, but then I remembered, I know I've seen him use his bugs once or twice in in part two.
Which leaves...Lee. Sadly, he is our winner (loser). I don't know why Kishi had forgotten about him, but hopefully it's because the Young Green Beast will 'spring' into action and have some major screen-time shortly..