Todd Spangler NY Digital EditorIn today’s podcast roundup, “Batman Unburied” flies to the top of Spotify’s charts; HBO Max’s “The Staircase” gets a companion podcast; Slate’s “Slow Burn” Season 7 will unpack the history of Roe v. Wade; Audible set to release “Beast Master” investigative narrative podcast about “Ohio’s bear king”; and more.DC’s “Batman Unburied” superhero series soared to the top of the Spotify podcast charts in markets around the globe this week after its premiere — unseating “The Joe Rogan Experience,” the controversial show that is the streamer’s regular chart-topper. The thriller from David S. Goyer delves into the dark recesses of Bruce Wayne’s psyche with an all-new storyline.The first two episodes of the 10-ep “Batman Unburied” bowed May 3.