earlier today we got a youtube video showing berlin where the lcs split will be held and later in the [video] at 1:28 to be precise, we see royal arena being on a poster in the background, the biggest stadium in Copenhagen, Denmark(https://www.youtube.com/watch?v=Jw5bPJhcgOs)
and today we got a tweet from santorin saying LCS will be held in Denmark link here
Update: /u/Dinophysis deficio also tweeted saying finals to be held in Denmark