Wilson Fisk's closet is now wall-to-wall white suits; the iconic look of the classic Kingpin character. This contrasts greatly with his color scheme in Season One where he is seen almost exclusively in black and charcoal suits, signifying his shadowy nature. By donning a silk white three piece, Fisk is seemingly telling the world he is no longer operating from the shadows, but now out in the light.
Kingpin's apartment when he is under house arrest was previously used in season one of Jessica Jones (2015) when Killgrave took over an apartment while his father was working to increase his powers.
The shirt Melvin is wearing when Matt first confronts him is patterned directly after his "Gladiator" costume from the comics.