MSI - The Winner of each regions finals.
NA
EU
Korea
China
Taiwan
Wildcard - (Ex - Brazil and Russia)
So the 4 regions that advance to the playoffs of MSI get #1 seeded teams for Worlds
Last Year KR, NA, China, and Taiwan all advanced while EU and WCL both excited before playoffs so KR/NA/China/Tai get to have there top world team be seeded into the 1 slot.
Last Years worlds sent:
Na - TSM(1), CLG,(2), C9 (3)
Eu - G2(1), H2K(2), Spy (3)
KR - Rox(1), SKT(2), SSG(3)
China - EDG(1), RNG(2), I-May (3)
Tai - FW (1), AHQ (2)
WCL - ANX, ITZ
So Group A was
Rox (KR -1), CLG(NA -2), G2 (Eu -1), and ANX (WCL)
Group B:
EDG (CH -1) , H2K(EU -2), AHQ (Tai -2) and ITZ (WCL)
Group C:
TSM (Na -1) , SSG (KR -3), RNG (Ch -2) and Spy (Eu - 3)
Group D:
FW (Tai -1), SKT (KR -2), C9 (NA-3) and Imay (CH -3)
To get into those groups a random draw took place
The following teams were the 4 1 seeds
Rox, TSM, FW, and EDG
The following teams where 2 seeds
G2, CLG, H2K, SKT, SSG, AHQ, IMay, RNG
The following teams where 3 seeds
C9, Spy, ITZ, ANX
-Based on MSI NA, KR, CH, and Tai got to have their top teams be grouped in the 1 seed slot.
-Based on MSI EU's top 2 teams where placed in the 2 seed slot.
-Korea and China's 2nd and 3rd best teams also place in the 2 seed slot.
-The 2nd Taiwan team is also placed in the 2 seed slot
-Wild Card teams are always both placed in the 3 seed slot
-NA and EU's 3rd best team are always placed in the 3 seed slot.
-Each group has one 1 seeded team, two 2 seeded teams, and one 3 seeded team.
I do think this years worlds may be different as far as placement, but for the most part years past as been that way I've discribed except having MSI impact the Worlds seeding. It used to be NA, Eu, KR, and Ch all had it's best teams as a 1 seed and Taiwan had both its teams as a 2 seed.
This year apperently will be vastly different from years past though.
Heres a link that should explain it well.
http://www.lolesports.com/en_US/articles/2017-world-championship-update