Olympics officially been postponed to next year & I'm sure in some capacity ARASHI will be involved in it , if not it would have gone to SMAP and TOKIO which now both bands are more or less no more
Other than endorsement deals , there's also their TV shows they host be it together or individually
It will be interesting to see if the TV shows they host as a group or solo will still continue on after their hiatus
Arashi no Shiyagare , VS ARASHI probably not but the rest like Aiba Manabu , Nino san will most probably continue on
Their old shows like Hitmitsu no Arashi-chan , Arashi no Shukudai-kun should at least be brought back for a 1 off special before their hiatus kick in , some of the old episodes were and still are so epic like of them being duped into going into a 'haunted' hospital & inn