With the (very) long list of available defensemen available in free agency this summer that I listed yesterday, and the (very) little amount of teams with a lot of cap room to sign these said UFA defensemen, I think it is very possible the Devils would be able to include Severson in a deal for Laine, and then sign 3 of Krug, Barrie, Vatanen, Greene, Gudas, Tanev, Dillon, Hamonic, Brodie, Hainsey, Shattenkirk, Schultz, Demelo, Braun, and Borowiecki to replace the loss of Severson as well as address the need for defensemen.
Say you trade Severson, Boqvist, 18th overall, and 20th overall for Laine. Then you sign one of Barrie/Brodie/Shattenkirk/Schultz to replace Severson, one of Krug/Dillon/Tanev/Vatanen to pair with the defenseman you just signed, and then one of Greene/Hainsey/Boroweicki/Demelo/Braun to play on the 3rd pair. Isn't that very realistic in this flat cap offseason where there are a huge glut of UFA defensemen and not a lot of teams with room to sign them?