Expectation: As I user I would like to have a Team Backlog which is defined as all issues not assigned to any member of my team. Teams are being defined as Shared Teams using the Advanced Roadmap module.
The idea for the solution: using JQL I'm able to filter all issues assigned to no one (EMPY) and filter items which has team value in teams that current user is added.
Problem: how to build a JQL filter that results with teams that current user is added.