User blog comment:Shabook/My ideas for Agents of S.H.I.E.L.D./@comment-12522-20140208081833

All interesting ideas. As for the cellist, this is how I see the show ending...

Coulson seemingly sacrifices himself to save the day, his team and the world. Everyone mourns.

Cut to a tropical island, wave crashing on the shore, we hear music from a cello and find that our friend Phil has faked his own death this time and retires off the radar with his lady. "This is a magical place".