Warhammer’s world isn’t evenly colored balanced as it wasn't created with the color pie in mind. R&D solved this problem by making Commander decks instead of a full set.
There are no current plans to make in-universe Magic versions of the new cards in the Warhammer 40K Commander decks, but R&D has the capability to do it if needed on a card-by-card basis.
This article or section discusses story elements that are not canonical. The story discussed here is based on another IP than Magic: The Gathering. It has no bearing on Magic continuity.
Most Warhammer 40K fiction is set around the turn of the 41st millennium (about 38,000 years in the future). Although Warhammer 40K is mostly a science-fiction setting, it adapts a number of tropes from fantasy fiction, such as magic, daemons, and races such as Orks (Orcs) and Eldar (Elves); "psykers" fill the role of wizards in the setting.
The four commander decks are also available in a Collector's Edition with a unique "Universes Beyond" card frame. The Collector's Edition comes fully foiled with the never-before-seen special surge foil and has the same card content. A complete set costs about 550 dollars.