^^
Well everyone is excited about Lukaku back in Chelsea but I have doubts over his arrival. He sure had great season in Serie A but he wasn't that good in United. Yeah he scored but his stats in Serie A is far more better than PL. Maybe its the league level or maybe he has now developed? but nothing can't be said for sure.
Can only say things after how he gels up with the current Chelsea squad in 1-2 matches after his arrival.
There is always the possibility that Lukaku could play better or worse in a different league. There is no guarantee he will be able to have the same ability as at Inter as a goalscorer because the Premier League is much tighter than Serie A. So far I don't see Lukaku as one of the foreign players in the Premier League, he also played well at Manchester United before and I think he understands the Premier League well so he will adapt easily at Chelsea.