This submission includes one file complementing the F1000Research article "Preprints and Scholarly Communication: Adoption, Practices, Drivers and Barriers" - https://doi.org/10.12688/f1000research.19619.1 The table 'Questions for future developments in the preprints landscape' lists a number of key questions that we believe need to be addressed so that preprints can be supported sustainably in the future, along with their owners. More information on this study is also available in the form of a report.