There’s some compelling, sober discourse in “Batman v Superman: Dawn of Justice’’ (2016) as to whether the world needs superheroes, or if we’re better off without them. Ironically, the Blu-ray could leave some viewers — even fans — chewing over a similar question about the movie itself. The hi-def “Ultimate Edition’’ arrives with an extensively hyped R-rated cut of director Zack Snyder’s film as its featured bonus. The offering was announced a few months back, shortly after the hit theatrical release of “Deadpool,’’ which embraced its dicey R rating as a key to success. The copycat thinking: Maybe more edge would equal more love for Ben Affleck and Henry Cavill’s brooding, coolly received clash of titans. (Not that the half-hour of added footage is all super-pummeling and hard talk — there seems to be a fair amount of incidental character material as well.) In semi-related news, the animators behind next month’s made-for-DVD feature “Batman: The Killing Joke’’ also willingly accepted an R. But was ultraviolence what resonated most about “Deadpool,’’ or was it the freewheeling raunchiness? The upcoming “Suicide Squad’’ — which, like “BvS,’’ comes from DC Comics and studio parent Warner Bros. — figures to have a similarly kooky spirit. And Warner is said to be pinning huge hopes on “Squad’’ to right a master production plan that includes next year’s “Justice League’’ and “Wonder Woman,’’ among others. So is this “Ultimate’’ showdown and the timing of its release something that’s good for the genre, or bad? Please, go ahead and discuss — just maybe not Batman-Superman style. (Warner, $35.99)

HISTORY/COMEDY

ELVIS & NIXON (2016)

At last, the story behind the world’s nuttiest photo op can be told. Michael Shannon entertains in more ways than one as the King — love his encounter with an impersonator — while Kevin Spacey’s president is the satirical flipside to Frank Langella’s “Frost/Nixon’’ read. And Alex Pettyfer more than holds his own as Jerry Schilling, Elvis’s conflicted right hand. Still, we’re puzzled about Shannon’s casting, at least with regard to his look. Hearing a starstruck woman gush about the “Boardwalk Empire’’ G-man’s beautiful eyes doesn’t quite compute. Extras: commentary by director Liza Johnson and Schilling, who served as a producer. (Sony, $25.99; Blu-ray, $26.99)

BIOPIC

MILES AHEAD (2016)

Don Cheadle does an impressive bit of multi-tasking, not only tackling the demanding role of jazz icon Miles Davis but also making his feature debut as a director and writer. Ewan McGregor grabs a cool gig of his own as a music reporter who makes an unlikely connection with Davis at his lowest. Looking for more real-life drama from the world of groundbreaking American music? Check out Tom Hiddleston swapping Loki’s horns for Hank Williams’s Stetson in the recently released “I Saw the Light.’’ Extras: on “Miles,’’ commentary by Cheadle; Sundance Q&A. (Sony, “Miles,’’ $25.99 Blu-ray, $30.99; “Light,’’ $25.99, Blu-ray $26.99)

Titles are available now. Tom Russo can be reached at trusso2222@gmail.com.