Pep Guardiola will not join Napoli because he is on top of Premier League and Europe after last six successful seasons with Manchester City. He will not move to a smaller club like Napoli but it's possible for Mourinho to do this. With Mourinho, there is another barrier for Napoli to sign with him. He is experienced and smart enough to realize problems in Napoli so he will likely wait for chances from other clubs.
Haha you are right, it's impossible to see Pep Guardiola becoming Napoli coach. because Guardiola currently, like Mourinho, will prioritize a team that can meet the players' needs according to their wishes and whatever the price. If Napoli hopes for Guardiola, then Naples must prepare a big amount for transfer fee. I'm not sure Napoli can fulfill this. Moreover,
Reuters reported that Calzona is currently Napoli's new coach.
Napoli do not have much money and therefore, it is impossible for Pep Guardiola to accept Napoli offer. Because after all, Pep Guardiola is a coach who wants the club to fully support about the purchase of players and many other factors in building a team. So, if Napoli do not have a lot of money, then of course Napoli will not be able to fulfill or grant Pep Guardiola's wishes and yes, it is clearly funny if anyone associates Napoli with Pep Guardiola. But, regarding Mourinho it is still possible because anyway, even though Mourinho also has high demands, but at least Mourinho can still accept the offer to become a coach at a team with a level like Napoli. So yes, I think it is still possible because after all, Mourinho is also still in a free status because Mourinho is not under contract with any club at this moment.