Wasted opportunities

What films,casts, filmmaker and actor teams were good opportunities but wasted, according to you?

I thought Aamir and Amitabh together was a good opportunity but totally ruined in a crap film like Thugs of Hindustan. Just an example.

I think they butchered Zoya Factor. It was a very fun book, they should have paid more attention to the script and direction. And cast DQ with someone else.

It was the worst film EVER.

Dhadak was a good movie. But so wished that there should b a good couple in that film like ranbir-deepika, aditya-shraddha or sid-parineeti etc. There r many jodis in bollywood who have crackling onscreen chemistry