Napoli are playing for their first Scudetto after their last one with Maradonna. It would be a great celebration for their new stadium name which is used their legend Maradonna.
World Cup makes Napoli more worry because their player resource is limited and if their players get injured in World Cup, Napoli will suffer a lot. I don't think Napoli will be too actively in a coming transfer window. Because of many reasons like, they don't have big budget for transfer and in middle of season it is very hard to find available good players on transfer market.
Napoli don't have to worry much about the world cup and their players because they don't bring many of them compared to other teams and above all they are not players who can influence the championship so Napoli can rest assured