Yet, unfortunately, Mantle's Approach was created/revealed and destroyed in a single game, which, somehow, doomed its appearence in SotP. Because it is set after the events of Halo 4, and this ship was destroyed during the events of Halo 4.
Well, in the Rebellion version, our mod takes place loosely around the events of Halo 4 without any events of Halo 4 being directly tied to the mod. Also, I wouldn't assume that there is only one ship like Mantle's Approach.