This new 4K presentation will feature Dolby Vision Hdr and 5.1 Dolby Atmos audio. Unfortunately a new Dolby Atmos mix wasn't in the cards at Lionsgate.
Bonus features are all found on the inclusive Universal Soldier Blu-ray from the previous release. They are:
Audio commentary by Roland Emmerich, Dean Devlin, Jean-Claude Van Damme, and Dolph Lundgren
Audio commentary by Roland Emmerich and Dean Devlin
“A Tale of Two Titans” Featurette
“Guns, Genes, and Fighting Machines” Featurette
“Behind the Scenes” Featurette
Here's a smallish look at the Universal Soldier 4K cover art.