What unique shit? I'm going to discount special characters, relics and psychic powers here.
Space Wolves? Fenrisian Wolf/Cyberwolf Pets, Chaplains which act like Apothecaries, Scout equivalents in Power Armour, Elite Scouts, True Grit Tactical Squads, Thunderwolves, Lone Killer Marines, Stormwolf/Stormfang, Helfrost weapons.
Of those, you've got "ancient martian hoodoo weapons", variant flyers, primal pets/cavalry, an upgrade for scouts/option for Veterans, upgrade for Chaplains, upgrades for Tactical Squads.
Blood Angels; ever increasingly "diverse" assault marines, some of which are similar to old school Wulfen, or what Mark of the Wulfen once was. Variant predator tank, samples of which were likely stolen following the near destruction of the Lamenters at the hands of the Minotaurs during the Badab Conflict, and due to their connection, possibly on their way around the rest of the chapters with close affiliation (like Red Hunters say) with the Inquisition. Or if it was me, that's how I'd write the story as to why Assault Cannons are now available on Predators (Flamestorms already are).
Dark Angels? Elite Bikers, Elite Terminators, even eliter Terminators.
Really diverse options. For the sake of an upgrade to Vanguard Vets and a Chapter Tactic.
Black Templars we've already seen how they can be handled.