"Wall mountable display stand" looks like re-issued stand from an earlier figure and does not appear to actually be wall mountable.
Trident accessory was apparently quite fragile as it is frequently broken when the loose figure is listed on eBay.
Namor the Sub-Mariner – monarch of the mighty, sunken empire Atlantis – strives to balance his fiery temper with his responsibilities of state. Ruling from his undersea throne, Namor's foremost concern is the welfare of his subjects. But on occasion, he rises from the depths to defend all humanity! Namor is an amphibian, and so breathes water and air with equal facility. He can lift about 85 tons at peak capacity, although his strength degrades the longer he remains on land. Namor is able to fly for several hours at speeds of up to 60 mph before tiring, and he possesses limited invulnerability.