This is the list (until now) of the rostermania. The percentage indicates the player's probability of staying on the team.
This list will be updated every day.

AMERICAS

KRÜ

Klaus: 50%
Keznit: 100%
Melser: 100%
DaveeyS: 70%
NagZ: 20%

LEVIATAN

nzr: 80%
Tacolilla: 10%
Mazino: 90%
kiNgg: 100%
Shyy: 100%

FURIA

mwzera: 100%
Quick: 0%
Khalil: 100%
Mazin: 0%
dgzin: 0%
kon4n: 100%

100T

Asuna: 90%
stellar: 5%
Derrek: 10%
bang: 20%
Cryocells: 90%

NRG

crashies: 90%
ardiis: 0%
Victor: 90%
FNS: 0%
s0m: 0%

EMEA

KOI

koldamenta: 0%
starxo: 90%
sheydos: 100%
trexx: 100%
wolfen: 10%

Team Heretics

Mixwell: 1%
Avova: 0%
Boo: 90%
benjyfishy: 100%
Keloqz: 0%

Giants

rhyme: 100%
Fit1nho: 100%
hoody: 100%
nukkye:100%
Cloud: 75%

NAVI

Zyppan: 50%
ANGE1: 100%
Shao: 100%
cNed: 0%
SUYGETSU: 100%

Fnatic

Boaster: 100%
Chronicle: 80%
Leo: 100%
Alfajer: 100%
Derke: 100%
mini: 65%

KCorp

ScreaM: 0%
ZE1SH: 0%
sh1n: 70%
xms: 0%
Nivera: 0%

Liquid

soulcas: 20%
Sayf: 20%
nAts: 100%
Redgar: 60%
Jamppi: 100%

Fnatic mixwell 100%

EMEA seems very accurate to me. Only about Mixwell thol, it's more of a 50/50, TH wants him but he still has not decided if he wants to retire to not

daveeys 90%
Mazin 20%
Zyppan 60%
Sayf 50%
Redgar 50%
Mixwell 50%