I wouldn't rule out the futures route. (1) Teams in competitive windows have done it in comparable situations. J. Staal, Ryan, Schneider, Drouin and Fiala are examples. (2) The Canes haven't been afraid of going that route. Not at the level of Necas, but Skinner, Faulk, Nedeljkovic, Bean and DeAngelo were dealt outside of hockey trades under this management group.
Carolina is now a desirable place to play. That opens the door to fill gaps in free agency (like Orlov) and via trade for players hunting a cup (like Burns).