Returning to Chelsea not guarantee for Lukaku get regular position under scheme Graham Potter depending his performance in this season with Inter Milan not quite, absent several games with Inter Milan trough still injury I think need for Lukaku scoring goals again if want get regular position at Chelsea. However new manager at Chelsea seems the same if Lukaku can't back to top performance again and seems Graham Potter not easy to give regular place for Lukaku. Still left one half season more and I think if Lukaku can back to quite performance Inter will try several option to extended loan or permanent with Lukaku transfer from Chelsea.
Lukaku no longer wants to go to Chelsea because his condition is still not fully recovered but strangely at Inter he played great and made the Inter coach have to buy him and also Lukaku said if he did not want to linger at Chelsea and wanted to return to Inter immediately , If his desire is like that then he should consider it well because it is not easy to get into a big club like Chelsea and of course Inter have to spend quite a lot of money to buy Lukaku.
At the moment Inter's condition is different from when he was before.
He could shine that time because Conte was able to maximize his ability well but now the era of Inzaghi and Lukaku is very difficult with this.
I think it will still be difficult for him now because regardless of what if his performance is not as good as the first time he was at Inter then indeed Inter will also be reluctant to keep Lukaku.