In addition, Napoli is also doing quite massive signing in this transfer market to defend the Scudetto title. Some other players they are eyeing are: Yunus Musah, Borja Sainz, Oumar Solet, and several other players on the list.
The age of 33 still seems to be quite favorable for a short period of time. A good performance history certainly gets him good enough, but for injury history I think Napoli should be wary. They should be able to use De Bruyne well. His long injury history might come back if Napoli are not able to manage him. A 2-year contract is good enough to tie him down for the second year. I think Napoli can take advantage by reselling him. I think many MLS and Arab clubs want him.