If you were thinking that the NHL looked a little bland last season, things are going to look a lot more interesting this time around.
When Adidas took over for Reebok last year as the NHL's uniform outfitter, one unfortunate side effect was a one-year hiatus for alternate uniforms (or, as the league prefers to call them, "third jerseys," although that's a misnomer, because a uniform involves a lot more than just a jersey). So for 2017-18, teams were limited to their primary home and road uni designs.
But the drought is over. As of this writing, 14 of the 30 NHL teams have introduced alternate uniforms for 2018-19, and several more are expected to follow.