As Dzeko is about to join Fenerbahçe and Lukaku is also about to leave the team I wonder what Inter are planning to do. Because they will need to bring at least one centre-forward to the team in this case. Even one might not be enough in the long run thinking of injury or suspension cases as well. One of these strikers should be a reliable one who can make a good duo with Martinez and the other one can be just a good substitute player who can do well when there is a need for him.
It looks like Marcus Thuram deal is about to become official for Inter already. He is a decent scorer but his being versatile is also an advantage for Inter. Because he can even play as a left winger and his stats there so far have been really nice too.
My recommendation for Inter Milan is to extend Lukaku's contract. I know why I'm making this recommendation because Lukaku has been one of the players who has helped the team perform perfectly this year, and I think he still has more to give. Inter will likely think that signing Lukaku won't help the team and that he is about to get old, but it will be much more exciting to watch Lukaku perform in Inter Milan than when he was at Chelsea.
Next season, Inter Milan will compete in the Champions League. Although I think the squad can succeed without Lukaku, in my opinion, he deserves a better environment like Inter Milan.
I don't think they will think that Lukaku is getting old because Edin Dzeko, whom they played in the first team, was 37 years old. Lukaku is only 30 years old. 30 is a young age for football now. A few more seasons can be spent more productively. I think Inter should renew their contract with Lukaku. I'm sure he will benefit Inter a lot.