IMO - The key to any decision will be driven by money. I cannot see the value for the broadcasters of taking additional games next season, in lieu of curtailing the league this season. Currently, the broadcasters have no material to promote and they'll be desperate for a short term fix to retain subscriptions and advertising revenues.
If they are only offered additional games next season they could face diminished returns for advertising slots, due to a saturation of games potentially reducing the value of advertising slots. Furthermore, the world economy will be trying to recover from a recession and more sports will be returning to screens and there is only so much sport broadcasters can show.
Therefore, I think games will return behind close doors on 6th June with a potential 2 week extension of the season into July. Then rescheduling the start of next season to late August.