Flipsid3 is gonna get rolled over in Group A.
LGB might surprise with sneaking into second place, after fnatic first, but Í'd still give odds to Titan as second place (by quite a big margin over LGB)
Group B, hard to say, because I don't know who really qualified.
NiP has been looking appaling recently...I believe they are like 1-7 in their latest 8 matches they played (although online but still), but they will be heavy fan favorites. I actually believe Na'Vi will finish first, ahead of NiP. Guardian is quite likely best OP currently playing and flamie and Edward have looked very strong recently.
Overall winner - fnatic.
Really sucks that top teams like vp, envy and especially TSM are not part of this tournament.