I have fifteen Iron Man 2 figures so far: 1 through 10, 12, 22, 23, 25, and 26.
Of the remaining ones that are out I only need 11, 13, and 24.
Wikipedia claims that 14 (Ivan "Whiplash" Vanko), 15 (Fusion Armor), and 29 (Titanium Man) are out already, but I've not seen any of these three in stores (and I've gone to every store in my area that sells them on multiple days), so either they aren't out yet or they're extremely rare.
The 13 figures that are yet to be released are in my opinion the most interesting. Nick Fury, the tactical assault drone, Black Widow, Iron Man and War Machine unmasked, etc. Normal Iron Man is cool and all, but I'm glad we're getting some figures in the line that aren't just more variations of Iron Man's armor.
My favorite figures so far from a purely aesthetic standpoint are 23 (comic series War Machine), and 1 (movie series Iron Man Mark 1 armor). The comic series Iron Man also looks pretty good.
My least favorite figures are 9 (Mark IV) and 10 (Mark VI) because they're the same exact figure except one has a circle on it's chest and the other a triangle.
If I were a kid and actually playing with these, I'd probably like 8 (Mark VI power-up glow) and 3 (flip-up armor), in addition to the deluxe Armor Tech figures (Negative Zone, Juggernaut, and Shockwave [Shockwave I've not seen in stores either]) the best.
Does anyone have any info on Ivan Vanko, Fusion Armor, and Titanium Man? Is Wikipedia wrong or are they just that rare?