It would be smart move for Civitanova if they want to continue rejuvenation of their team since basically there's no other that much acclaimed young setter on international youth level with already big pro experience right now (esp considering he's Italian) - but I don't think it will happen and they'll wait a year rather than buy out valid Porro's contract in Milano RIGHT NOW and not re-sign De Cecco for a year, considering the latter won't leave Italy, so there's no rivalry for him at this point on a market. Brizard will renew his contract with Piacenza, so with Sbertoli, Giannelli, Bruno, Cachopa, Giannelli having contracts for the next season, only Verona theoretically can fight for him, and still they have Spirito and at least for now they haven't had a budget big enough to sign such players. I'd bet the next year Porro will get a contract in a top team (Bruno will be 38 and De Cecco 36, not a disaster, but not an asset neither if you plan to build your team for longer than a year or two).
Porro will be great in a near future, but Milano is messy: Ishikawa played like ... well, bad for half of the last season (had some health issues), Ebadipour is a ghost, Patry is awful for the past two years, Loser had some health issues as well and until recently was coasting with Vitelli outplaying him - it's hard to shine as a setter within such environment. Piazza like two weeks ago was publicly complaining that his methods doesn't work and his team needs something different than his coaching, lol, but they defeated Civitanova and everything got fine surprisingly. Milano still has had pretty potent team in this period, so when they'd clicked (like the last year when Ishikawa got back to his normal shape) they look like a decent team and results are fine (the same this season when Ebadipour got finally benched), and Porro immediately (like in a game against Civitanova in Cup) was thriving. Perhaps that's the reason this whole rumor started, Milano and Porro kicked out Civitanova b2b in Italia Cup in the past two seasons.
So it depends on which path Civitanova will choose on a market, and that depends on their financial situation: there are rumors they have verbal agreement with Bovolenta (he's great on A2 level, especially for his age, MVP of the last ECH U20), if they don't have budget big enough to compete with Perugia/Piacenza, then multi-year deals with these most talented Italian youngsters make lot of sense.