I personally don't think any team can really beat SKT.
SAMSUNG GALAXY
Good team and did take SKT to 5 games at Worlds last year but we've seen it before where a young up and coming team(ROX) get beat the first time and like a fairy tale everyone expects there to be a "passing of the torch" the second time the same two teams face but didn't happen in the 2016 Worlds either.
ROX even built a team for 2 years with 1 goal ( To beat SKT at Worlds) and lost both times.
Not to mention both SKT and SSG were around 31 mins in both Korea and Worlds, SSG had around 25-26 mins in the tournament to get to Worlds that they either won or lost in pre 30, as well as for X amount of years everyone was sick of the Worlds finals being a slaughter to declare the Winner and 2016. So, 2016 Finals SKT were up 2-0 against SSG and magically lost the next two games in a 72 min game and in a 46 min game in which they looked like it was solo Q or something and not the SKT that they actually were.
Point is I 100% believed it would have been an easy 3-0 but SKT wanted to give the fans something to watch sense some were tired of seeing SKT win atleast they can say (they almost got beat by another team).
KT ROLSTER
A team that got built with superstars to beat SKT, hmmmmm, haven't seen this before!
RNG got beat by SKT multiple times in 2016 and defeated them twice at both MSI and Worlds but to be fair those games were exciting to say the least. Point is ROX Tigers built a team very similar to how KT are currently developing but it just won't happen.
SMEB - Remember when people were saying SMEB > Faker ? Smeb might have been good for X splits but Faker has been good for years and has been the stable of the pro scene in League, not to mention Smeb can be the best player on his team but he can't play Top and Mid; someone else on his team needs to first beat Faker in lane, while trying to fight 4 other players that are all equally good as Faker because of the system that SKT are in ( 1 for all and all for 1/ Anyone can carry any given night/ all can and are willing to take a back seat for another to WIN).
PAWN - Injuries, inconsistent at times. He was called the Anti or Rival to Faker when Faker pretty much had an aging and tarnished team( Impact/Piglet/PMD-PooXXX something forgot his name SORRY!) You just never know what type of Pawn you will get on your team.
DEFT/MATA- I love Mata and his shotcalling but it's still 50/50 in botlane you can have a GREAT ADC/SUP but it's still half n half not 100% ( 2011-2014 CLG) and I personally have 0 faith in DEFT, I think he's good but over hyped( get the pitchforks and fire ready!) not bashing the dude either as DEFT > ME but I think he's all hype and no results.
And those are the two top teams that have the ability to beat SKT and it's not even close.
LPL teams are good and are getting 10X better each year but the bar is still so far away Earth to Pluto bar, they play fast and hard but at times it's too damn fast for their own good.
NA - What was it back in 2014 3-1 vs SSW and that 1 game was the first win for like 5 years or something for NA vs a Korean team, NA has beaten a Korean team like 4-5 games in a 7 year period.
EU - Are pretty much the same as NA but a tiny bit better in my opinion but it's still laughable especially since G2 are the constant representatives for EU and .....
That's what SKT are against not to mention what they do HAVE on their side, the best player, the best coach, the best mentality to win instead of KDA, a group/team that has had years of playing with each other(BANG and WOLF) were on SKT's sister team for like 2 years so they built a bench.
long story short - SK Telecom T1 will and always will win, HOWEVER if I had to say what team can rival SKT and possibly defeat them at Worlds
- SSG- Team that has stuck together, experience is never bad on a team.
- RNG- UZI(best ADC in my opinion) has a history of meeting up with the potential winners but team needs to step up
- EDG- Fading fast but has SO much talent
- WE- Very similar to RNG(2016) butt loads of talent but needs to play better as a team.
- KT- False hope in my opinion but still has a good core of players.