What they need is an A380 NEO.
The New Engine Option led to savings in fuel consumption that made the extra outlay for the A380 uneconomical.
Getting ultra high bypass engines (maybe with geared fans) onto the A380 as well as the other aerodynamic refinements that made the NEO such a hit would make the A380 competitive again. The question is: Will it be sufficiently competitive to pay back the investment?
I am convinced that they are crunching numbers in Toulouse and Hamburg.