Ancelotti may influence ADL to spend more though.
They will likely lose Hamsik and Jorginho. But if they open up the wallet and buy smart, they shouldn't drop off a whole lot. As great of a manager as Sarri is, his system is his system and he's not going to change it to accommodate players, which is what ADL has used as an excuse for not spending more on the transfer market. Ancelotti would come in demanding a bigger squad to compete on multiple fronts, I'm sure.
That being said, I see Napoli finishing 4th next year, behind Roma, and Inter.
Roma has a good squad as it is, and a lot of confidence after their CL run this season, that team is on the right path, has good ownership, and solid plans for the future. If they can add a few nice pieces to their squad this summer, they should pose the biggest threat to our 8th in a row. Inter is a wildcard because of CL, they will be competing on 2 fronts, but I also expect them to invest heavily now.