My picks for the round of 16
Group A
IMmvp
oGsMC
3rd: STJuly
4th: oGsHyperdub
Group A is pretty easy pick. The champion IMmvp and the Kratos Protoss oGsMC should advance with no problem. The only thing I can see that would a minor threat is July as new maps favor Zergs macro game and he is a veteran of the game with deep insight, but I don't think that will be enough.
Group B
oGsZenio
EGIdrA
3rd: ZeNexByun
4th: TSL.Clide
Group B is a bit more even but Idra should advance to the round of 16 without problem. It will probably be very even between Byun and Zenio, but heck if I don't go with Zenio on this one. I think he is hungry enough to take a place in R16. Clide, although being the best player that have ever lived is feeling shaky and I don't think he will advance.
Group C
Liquid`Jinro
CheckPrime.WE
3rd: ST.RainBOw
4th: PoltPrime.WE
Jinro is the clear favorit in this group, his TvT is probably his best match up and with three Terran players, this should be easy. Check is going to have a hard time, but this will definitely be his last battle before going to the army (if he looses) and a player that has his back against the wall is a dangerous force to reckon with. RainBOw and Polt will probably do good, but not enough.
Group D
oGsNada
oGsTOP
3rd: HongUnPrime.WE
4th: TheBestfOu
oGs will probably rule this group. NaDa is NaDa and he will destroy most of his competition with is 400 APM and deep knowledge of the game. TOP showed everybody in code A that he is a "top" (yeah, clever I am ) level S-player. The only real question is who will get 3rd or 4th place in this group. I would say that HongUn is a step better then TheBest....(I will stop with the puns now.)
Group E
IMNesTea
SlayerS_BoxeR
3rd: SanZenith
4th:oGsEnsnare
Man, this is a hard group. The only clear advancement I see is NesTea, the rest is pretty much a gamble. I would probably place Boxer and SanZenith on the same level with Ensnare just half a step after. I will go with my heart and say that the Emperor will take the advancement to R16 in a tight game with the other two.
Group F
choyafOu
FOXLyn
3rd BanbanssuZenith
4th oGsTheWinD
This group is pretty easy to predict. Given the recent play of both choya and FOXLyn, I am pretty sure they will advance, but BanBanssu will not go down easily. TheWinD is not really code S material and he will most likely go down quick.
Group G
TSL.Trickster
TSL.FruitDealer
3rd: NSP.Genius
4th: anyproPrime.WE
Not as easy to predict as group F, but this should be taken down by FruitDealer and Seo Ki Soo, although FruitDealer was eliminated very quickly last GSL I think he will do better this time around. Blizzcon 2010 champ, Genius is no push around and he will not make things easy. anypro will have a hard time in this group.
Group H
MarineKingPrime.WE
KyrixZenith
3rd sCfOu
4th: oGsInCa
Hard group but, MKP and Kyrix will probably take it. Kyrix has shown that he is very impressive. I think his Zerg play will do well with the new maps, but I would not count out the former GSL R8 sC. This is one of the more uncertain groups, but I do think InCa, although a great player will not advance to R16.