Ehh I'm more of a Birdman fan. If you are more of a Michael Keaton as Batman kinda guy, then these classic Batman boxer briefs should get your engine
Batman Classic Men's Underwear Boxer Briefs- Medium (32-34) Black
Batman Men's Basic Underwear in Mens Basic Underwear & Undershirts
Batman Hush Symbol Men's Underwear Fashion Briefs
Batman 848666-ll 28-30 DC Comics with Batmobile Boxer Briefs
Batman Boxer Briefs
Batman Underwear Men
Batman Classic Men's Underwear Boxer Briefs- XLarge (40-42) Black
Batman Men's Basic Underwear in Mens Basic Underwear & Undershirts
Batman Classic Men's Underwear Boxer Briefs- Small (28-30) Black
X-Men Wolverine 2-Pack Boxer Briefs
Men's Batman Boxer Briefs