I never bought that his return to Sweden had anything to do with Sullivan. He would've had to clear waivers which means 32 teams would've had a chance to pick him up if they wanted to.
I think it was a combination of factors, and I think that somewhat serious concussion he got probably made him question if it was all worth it as well. Serious brain injuries with possible long-term consequences might be worth it at an NHL salary, but not an AHL salary.
I'm guessing in Sweden he's somewhere in between an AHL and NHL salary, with better rules and player safety.
I wouldn't mind signing him to a 1 year deal and just see if he makes the team out of camp. And if he doesn't, we can waive him, and if he clears we can agree to part ways again. Worth a shot for both sides.