How to create similar Roadmap either from a report OR some other settings in Workfront Classic?

Thank you for posting this Kundan. There is no view like this within our custom reports. This is a view from our Scenario Planner product, which is set to launch in August. This tool will provide you with the ability to centralize your planning activities around a roadmap of initiatives. Within the plan you can assess priorities, people and budget demand, and other key criteria. It will highlight anticipated conflicts, and allow you to create various scenarios through which you can evaluate the best approach towards execution. If you are interested, i am happy to coordinate a call with your team and myself to give you a better overview of what we are working on here.