I don't think Gorribal itself is present there (or the physical sword of Sargeras if "Gorribal" is no longer canon), just the actual wound in the planet itself from being stabbed before Sargeras was sealed away. The PTR of the Wound site in Silithus just shows the incision point in the crust of Azeroth as a chasm, with red-gold Arcane essence leaking out of it and staining the sands of zone. Everything in the radius of the Wound is also charred and blackened as if from great heat, no doubt of product of Sargeras's brief proximity and the devastation unleashed by the impact of the blade.