You think Dallas will trade for Lucic's contract *and* retain on a contract they are sending back to complete the deal?
Wow.
It was a description of the transfer of salaries. It showed that 'if' Dallas retained, there would be no cap impact this season either way. I don't 'think' anything is going to happen. The original comment suggested a deal would make sense based on the fact that Dallas was interested in Lucic's services just two seasons ago. And since then, there's been an opening at their top six LW position.
Realistically, Lucic's cap impact in 2020 (when Hanzal's deal ends) probably isn't as significant as people are making it seem. At that point, at 32, he's got three years left at $4.3aav in real cash. The contract is still very movable at that point--even if Lucic turns to stone.
If a GM likes what Lucic can bring to the table, this is the type of deal you'd probably see. No 1st rounders, no top prospects, no exorbitant retained salary. There are still plenty of hockey minds who value the power forward--its the reason why Tom Wilson is making $5m today.