Could Neptune lead to a successor cruiser?

If the Neptune cruisers had been built, would Britain have built a successor cruiser class?

Possibly, if they remained useful long enough; service in the Falklands War could have renewed demand for their guns.

A successor class depends on the completed Neptunes remaining useful for a substantial period. Simply building them would not settle that question. If a cruiser survived into the Falklands War and its guns proved useful there, that experience could create demand for a replacement with similar capability.