Nkuku's arrival at Chelsea is a fantastic move for the club, but hoping for too much from him may be disastrous. I don't believe he's ever played in the Premier League, and as we all know, the Premier League is very different from the Bundesliga, from whence he comes. It may take some time for him to learn and bond with the style of football played here. He's a fantastic player, and his move to Chelsea will be fantastic if the coach can put him to good use.
TBH, I'm surprised that Christopher Nkunku really wants to join Chelsea.
We know that Chelsea finished this season with a very bad result, they were out of the top 10 in EPL. In this situation, I assume not many top players want to join Chelsea because they won't play in UCL or Europa League. Top players mostly want to stay playing in the highest competition of football. But Christopher Nkunku thinks differently, he seems interested to join Chelsea because he wants to help Chelsea to be a strong team again. Sure, it won't be easy for him, he must take time to adapt to Chelsea game style and EPL atmosphere.
What choice does he have, he signed for the club before Chelsea got into all the problem started facing before the season ended. Christopher Nkunku didn't sign in this summer transfer window, he was already a Chelsea player bought during the January transfer window (that's if I'm not mistaking) and was only wanting for the season to end before he makes the transfer to Stamford bridge. No matter how bad Chelsea was playing, nobody believe we'll end out of all European competition but sadly that's where we find ourselves at the moment. Christopher Nkunku is going to be on a good salary and that should be enough motivation to play for he club.
He's a good player and with the new coach (Pochettino) coming and possiblity of signing new players, they'll definitely enjoy their time playing for Chelsea. We mightn't be in any big competition but that gives the players a higher chance of winning a cup trophy in England and giving the fight for the title a higher possiblity of winning it. Chelsea has nothing to lose next season so they should be giving their 100% for the title challenge. Chelsea won't be playing under any pressure and it'll give the new signings enough time to adopt to the league so he's still making a good choice coming to Chelsea.