{C : Type u₁} →
  [inst : CategoryTheory.Category.{v₁, u₁} C] →
    {D : Type u₂} →
      [inst_1 : CategoryTheory.Category.{v₂, u₂} D] →
        {motive : CategoryTheory.Join C D → Sort u} → ℕ → Sort (max 1 (imax (u₁ + 1) u) (imax (u₂ + 1) u))