They will never be defeated in a competion ever again . D/r are 2018 Olympic champions .
I think you're wrong. Even if they will be undefeated this season (which is a pretty big IF), Sui/Han will overtake them easily until 2018. I'm not so confident about russian pairs, although if V/T will master 4Tw, and S/K will do 3-3-2 and quad throw (which they already doing succesfully) I can easily see them as medal contenders.
And yes, I think Trankov deserved that shade, doesn't mean he's not right about some things