I believe that world's suits CG's playstyle and they will get out of their group (assuming they don't get hit with a group of death). I think that, once again, Cloud 9 will be NA's best representative at world's as they seem to have the best adaptability from your region. As for TL, I think they will probably do pretty bad. Their one dimensional style will probably lead to them not getting out of groups.
CG are definitely the best of the other teams to send, was rooting for them for a while and their reverse sweep of TSM was one of the few series i got hyped up for this season. (Got hyped for C9 Vs TL as well, shame how it ended)
TSM and CLG have been so boring to watch this season and I feel (like TL) they woild not adapt to other teams play style fast enough.
As for EUW I'm gutted that Rouge didn't get to go and believe Splyce will most likely finish last in their group or second to last depending on the group.
C9 and Fnatic will probably go to quarter or semi finals depending on draw.
Hoping G2 get to finals and have a chance of winning.
TL:DR
Congrats CG, think they will surpass expectations at worlds.