While I was at TG Jones (Formerly WH Smiths) today, I bought a copy of the Miniature Wargames magazine, issue 514. It came with a free Armoured Clash sprue by Warcradle.
When I bought it, I assumed it was the standard Imperium armoured sprue. I am unfamiliar with Imperium units. When I got home, I checked the existing sets and found that the sprue that came in the magazine doesn’t exist in any currently sold sets.
I then proceeded to ask on the Discord server if anyone knew, and to my surprise, no one else had seen it either. It turns out I had just potentially found a sprue for a new set yet to be revealed, assuming it’s not a sprue made just for the magazine.

The sprue is named ‘Teutonic Knight Regiment’, suggesting that they are going to do themed boxes for each faction, potentially sub-factions.
It comes with six bases of Teutonic Armigers of either variant and two Panzerwagens. Assuming this follows the standard two sprues to a box that makes twelve armigers and four Panzerwagens. Alternatively, there is the possibility of a different sprue, potentially a larger vehicle, some of which have been shown in concept art form.
This likely suggests that Armoured Clash is gaining some more focused boxes for those who want a more specialised army.