Not really, if we ever are to get a Seafire III it will be when the Spitfire 3D model gets updated and at that point this and all the other Spit skins would be obsolete.
I did the original AH2 Spit default skins way back when and I remember at the time there was some uncertainty about which Seafire mark HTC should model. I was pushing for a Mk III as there were a lot more of those made, it would be a better MA plane and it was the first proper carrier version with folding wings etc. In the end Pyro went with the Mk II, probably because the Mk III would be over-powered for the mostly 1942-43 Mediterranean scenarios the Seafire might be used in.