No, I don't see any hand writing on the wall concerning the future of Victor Osimehn at Napoli, Victor is a very Young vibrant striker that has proven himself countless times in his club and even though there is arrival of a new manager now I doubt if the coach will want to allow Osimehn to leave the club to sign an older striker to the team.
Unless Victor decides to leave Napoli to another club which I know most teams are interested in getting his signature I still think Conte won't sign another striker to bench him knowing the level of force, form and how good he has been in front of goal.
But Conte is reportedly very interested in getting Lukaku into the Napoli squad. But there has been no discussion about Conte's opinion about Osimhen. And actually Conte was also given a fairly large budget for the upcoming transfer market. So it could be that Conte really wants Lukaku to come and also keep Osimhen. And that way Napoli will have two great strikers in the team. But the problem is that the club seems to have the intention of releasing Osimhen if a good offer comes for Osimhen.
Even though I am very sure. That Osimhen can return to his best performance again at Napoli under Conte's coaching. Because Conte is usually always able to bring out the maximum quality from a player. So I am also quite sure that Conte will also want to keep Osimhen.