The number 1 target will be the Canucks Elias Lindholm, the Swedish forward was a star in Calgary but since being traded to Vancouver has been struggling which is why the Canucks will most likely not re-sign him. The Bruins are said to be very interested in signing the forward as there was speculation that they wanted him at the deadline. He currently has 41 points in 71 games this season.
Another free agent they may go after is Stars' Matt Duchene who has been having a great year with Dallas. Duchene currently has 62 points in 72 games and if the Stars decide not to extend him before the July 1st deadline, it looks like the Bruins may offer him a contract.