AP had a interview with Simon Iddon, Product Manager for DX DSLR at Nikon UK. Similar to Canon, Nikon’s position is that they have “a complete line-up and does not need to fill any gaps in its product range with a compact system offering“.
Nikon does not see the mirrorless market as a threat to their DSLR line: “compact system camera market will not divert sales from the DSLRs, because if you want a DSLR you want what a DSLR stands for and that isn’t a compact system camera”.