Shim Jae-won, SM's performance director posted on his twitter a photo showing cups labeled with Super Junior's names. It looks like they are discussing the dance formation.
In his tweet he also mentioned that he's working with SME's choreographer Gregory Hwang.
Here's the formation.
Here I label it.
Source: @Famous Jae twitter
English labels by ShayneKay @ DKPOPNEWS.NET