Odd Warrior is one of the archetypes that came along in The Witchwood. Running Baku the Mooneater gives you the upgraded Tank Up hero power that allows you to gain 4 armor. This naturally lends itself to a control based deck which Warrior has been famous for in the past.
The Boomsday Project brought along some Mech synergy to Warrior. Eternium Rover is a solid 1-drop, but the main event is Dr. Boom, Mad Genius. It seems like Blizzard is going to keep going with the one hero card per expansion theme, and Warrior was the lucky benefactor this time. It’s a solid card, and gives all of your mechs Rush for the rest of the game. The hero power is RNG based, but there’s a lot of good options available to you.