Analysis on top 32 (winners side):
Earth - Not entirely a surprise. 25th on the PGR and since Xzax upset ZeRo, the only PGR ranked player standing in his way of Winners Top 32 was dyr (37th).
CaptainZack - Definitely expected in top 32 (20th on the PGR), but Winners Side may have been a bit of a stretch. In terms of PGR players, he notably upset Kameme (11th) for the Winners Side spot.
Mr. R - At 10th on the PGR, this should surprise no one. Only PGR player in his way was Mew2King (26th).
Nietono - Similarly to Earth, a strong contender (36th on the PGR) whose odds were improved by an upset in pools (though Nietono's pool had 2 upsets). Sonido (unranked) beat Zinoto (16th) and FOW (unranked) beat Larry Lurr (5th), thus Nietono did not need to defeat any ranked players to advance to Winners Top 32.
Locus - At 45th on the PGR, another potential candidate for Top 32 who made it to Winners Side due to an upset. In his pool, Mr. E (18th) was upset by DJ Fliphop (unranked), then Locus himself upset Ally (2nd) for the Winners Side seat.
Kirihara - Only 48th on the PGR, but after his impressive victory at FPS 2 last week, he was a safe pick for Top 32. He beat ESAM (27th) 3-0 for the Winners Side spot, but after FPS 2 (in which he also defeated ESAM 3-0), it's hard to truly call this victory an upset. He also has notably not dropped a single game yet.
Dabuz - 4th on the PGR and the 2nd highest in Winners Side. Definitely expected to go far, and even more so with some of the best competition now eliminated. Since Aarvark (unranked) upset False (41st), the only PGR player in his way was MVD (47th).
Shuton - Although not ranked on the current PGR due to his first US tournament being Frostbite, he was a notable pick for top 32 due to strong showings in Japan (3rd on their PR) and at Frostbite (5th place). He notably upset Salem (13th) with a 3-0 victory. Like Kirihara, he has also not dropped a game.
T - Like Shuton, not currently ranked on the PGR due to not coming to US until Frostbite (16th on Japan PR). Similarly to Earth and Nietono, upsets in pools likely improved his chances. Meteor (unranked) beat MkLeo (8th), and due to 6WX (31st) being upset by Felix (unranked), T fought NAKAT (unranked) for the spot in Winners Top 32, securing the spot without defeating a ranked player (like Nietono).
Tsu - Again, like Shuton and T, he did not come to the US until Frostbite and is thus currently unranked, but is 13th on the Japanese PR. After his strong showing at Frostbite, though, he was a popular pick for Top 32. Standing in his way were falln (33rd) and Nicko (unranked), who had just upset ANTi (9th).
HIKARU - With this only his 2nd showing in the US, after a 33rd place defeat at EVO 2016, he was not only absent from the PGR, but was also an unlikely candidate for top 32 (although he is 10th on Japan's PR). After Konga (unranked) upset Ned (50th) in pools, the only ranked player in his way was VoiD (6th), whom he upset 3-1 (worth noting that VoiD did not use his main, instead opting to use Fox, who is considered to have a better matchup against Donkey Kong).
Abadango - Highest ranked Japanese player on the PGR (7th), so was expected to do well. What was unexpected was the lack of PGR matches in his pool. He had been predicted to face off against Wrath (43rd) and Pugwest (39th), but both were upset by unranked players (Wrath by Zion and Pugwest by Elegant). Thus, Abadango instead faced AC (who defeated Zion) and Elegant, defeating them both and making it to top 32 without any victories over PGR players.
Nairo - 3rd on the PGR, so naturally expected to do well, but with ZeRo (1st) and MkLeo (8th, 3rd with X-Factor) eliminated and Ally (2nd) in Losers, he is a strong contender to win the tournament. Like Abadango, upsets prevented Nairo from ever meeting the expected PGR opponents. saj (40th) was upset by Shaky (unranked) and Rich Brown (23rd) by TonySherbert (unranked), thus Nairo fought Shaky and Javi (who defeated TonySherbert and is also unranked) in their places. Like Kirihara and Shuton, he has not dropped a game.
Ranai - 14th on the PGR, and despite occasional bracket setbacks, typically expected to do well. He notably had one of the least stacked pools, with the only other ranked player being Marss (15th), whom he defeated 3-0 for the spot in Winners Top 32. Like Kirihara, Shuton, and Nairo, he has not dropped a game.
komorikiri - 12th on the PGR and an almost guaranteed pick for Top 32. As expected, he defeated Pink Fresh (24th) in pools, but due to Lycan (unranked) upsetting both Samsora (29th) and Dath (32nd), komorikiri and Lycan would face off for the Top 32 Winners Side spot. komorikiri won 3-0, becoming the 5th player to enter Top 32 with no game losses.
Fatality - Perhaps unlikely, but not surprising, due to his 28th PGR placement. His bracket also had several major upsets. Kome (unranked) defeated Ryo (46tth) and Tweek (17th), thus Fatality would face off against Kome after defeating Trela (42nd) and ended up winning 3-2.