I believe project managers can play a great role in any agile approach.

https://medium.com/serious-scrum/youre-a-project-manager-and-your-company-decides-to-adopt-scrum-what-s-in-it-for-you-5744e305f014?sk=32558f…

I believe project managers can play a great role in any agile approach. That said, it will be more as a peer instead of a manager. I wrote this article about that:

https://medium.com/serious-scrum/youre-a-project-manager-and-your-company-decides-to-adopt-scrum-what-s-in-it-for-you-5744e305f014?sk=32558fc4025408475118c7ee0b34cb23