Will be interesting possibly will be related to Luffy following in Shanks' path and will hopefully show how Shanks rose to be an Emperor
None of these films involve actual main characters as villains/antagonists anyhow. Funny enough, Gold and Stampede both featured Lucci and Sabo, who still are featured in the main story, regardless of how those films play out.
So however it involves Shanks, it has zero bearing as to how Oda plans to use him in the future plot.