If anyone still doubted that Jorge Lorenzo has signed for Ducati for 2017 and beyond, then the news that Yamaha Motor Racing boss Lin Jarvis will be at Thursday’s pre-event press conference at Jerez should finally convince them. It is not so much that team bosses never appear in pre-event press conferences, but rather that such appearances are vanishingly rare, and often momentous. If Jarvis is not there to discuss Lorenzo’s move to Ducati, then something has gone very awry indeed.
We have been here before, of course. When Valentino Rossi finally announced he would be moving to Ducati in 2010, a similar procedure was adopted. So taking account of the lessons from that move, and of Rossi’s return to Yamaha, let us gaze into our crystal ball and see what we can expect for the upcoming days.

Source: Lorenzo To Ducati: Why It Happened, and What Happens Next