For the upcoming launch of Halo Wars 2, 343 Industries partnered with three artists to create a series of limited edition character posters that are absolutely amazing. Halo Wars 2 releases on February 21st for Xbox One and PC, but the posters themselves will be available through the Xbox and Halo Twitter channels over the next few weeks. So you may want to keep your eyes on those.
The three artists in question (in line order below) are Grzegorz 'Gabz' Domaradzki, Kevin Tong, and Craig Drake. Check out the art below, click through for full credits and titles: