AC Milan are still not finished their transfer plans. They recently reached an agreement with Chelsea for Nkunku, which could potentially improve AC Milan's attack. although a little doubtful, I hope Allegri can bring AC Milan much better, after become mediocre clubs since its last title under Pioli. There's a lot of work for Allegri to do.
To tell the truth, I'm not expecting a great performance by Nkunku. He couldn't find a place for himself at Chelsea and they wanted to get rid of him just as they did with Jackson.

Some players are reborn at their new teams but I don't see it very often. Rather than Nkunku, Milan should have gone for better finishers. Nkunku isn't even a centre-forward normally but Chelsea used him like that for a while.