Fun theory time!
Shepard and his crew head back to the cidatel to share with the council what just happened between them and the collector ship but without sufficient evidence the council once again dismisses his statements as crazy (again) and now that the threat of human colonies disappearing is over and done with the Illusive Man reduces all of Cerberus's resources towards Shepard's escapades against the reapers. On top of that, some of his squadmates leave after the collector incident now that their mission is over (Somara/Morinth, Zaeed, Thane, Kasumi, potentially Tali, Jack and Mordin) Without any leads or anyone's backing Shepard travels into the far reaches of the galaxy, desperate to find something. After several months Shepard is deemed AWOL and the human council member sends one of the Alliance's top agents to investigate Shepard's last known whereabouts in the Vostok system.
Also guys remember that Bioware was hoping to make some kind of multiplayer aspect in a Mass Effect game? Maybe even...cooperative?
Shepard and his crew head back to the cidatel to share with the council what just happened between them and the collector ship but without sufficient evidence the council once again dismisses his statements as crazy (again) and now that the threat of human colonies disappearing is over and done with the Illusive Man reduces all of Cerberus's resources towards Shepard's escapades against the reapers. On top of that, some of his squadmates leave after the collector incident now that their mission is over (Somara/Morinth, Zaeed, Thane, Kasumi, potentially Tali, Jack and Mordin) Without any leads or anyone's backing Shepard travels into the far reaches of the galaxy, desperate to find something. After several months Shepard is deemed AWOL and the human council member sends one of the Alliance's top agents to investigate Shepard's last known whereabouts in the Vostok system.
Also guys remember that Bioware was hoping to make some kind of multiplayer aspect in a Mass Effect game? Maybe even...cooperative?