In order to support requirement engineering (e.g. a Kanban board for monitoring the progress of stories planned for upcoming sprints) it is needed that the future sprint frames in the planning board can be used in filters.
An example: if the current sprint is SP10, and there are SP11 and SP12 defined in the planning board (they are not started yet), it should be possible to create filter sprint = SP11_ID that returns the issues currently planned for sprint SP11.