There's a snowball's chance in hell he gets traded. Who trades prospects a couple months before they make the jump to pro? I imagine it would have to be part of a larger shakeup to occur, because Willander's been in the future plans for a couple years now. By all accounts they love this kid.
Everyone will get a chance to watch him in a couple weeks at the WJC. Going off last year, Team Sweden plays much more of a pro style of hockey than Pondolfo's BU Terriers. It'll be a much better litmus test to see where he is at, compared to what's going on at BU this season.
Willander played near flawless positional defense last year at the tournament--so going in with that as a baseline, I'll be looking to see if he's improved his strength defensively in more static situations on the ice, like along the boards and net-front, and then looking to see where his confidence is at navigating breakouts and to a lesser degree, where his confidence is with possession in the offensive zone. Those are areas (particularly the first two) that will really be key if he's going to hit the ground running in the spring.