Going To Be Even Larger Than The Sea Wolf Class
The SSN(X) needs a lot of features and armaments to keep up with its competition. This means that it needs a bigger hull than those found in its predecessors. For reference, the former is capable of carrying 9,100 tons. On the other hand, the latter has a capacity of 7,800 tons.

Going To Be Even Larger Than The Sea Wolf Class
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Two Types Of Fuel Might power the Engine
When you have a huge vessel, it is only natural that it will take a lot of power to power it. The new design will need an engine that runs not only on diesel-electric but also on nuclear power. However, it is going to require much planning to turn this into reality.

The Engine Might Be Powered By Two Types Of Fuel