Christophe Gateau/Getty Images
- Elon Musk said Tesla's "Master Plan 3" will focus on a "fully sustainable energy future for Earth."
- At the same time, the CEO cast optimism on the US automaker, saying Tesla has a bright future ahead.
- Its "master plan", which will be unveiled on Tesla's Investor Day, comes at a time when shareholders are at odds with Musk.
Elon Musk said Tesla has a bright future ahead as he gets ready to charm vexed shareholders at its Investor Day.