Today we saw a video from DOTA2TVKR that shows Nexon getting ready to use their IDs to play Dota2. In the video, they set the launch option in Dota2 client with the peripheral: "-nexon" when they login to the game. The first page shows their rating in korea. In the second page, It has a caution linking your Dota2 account to the Nexon account before playing Dota2. 

 

 

log in page

 

 

Source: DOTA2TVKR