A new generation of advanced batteries. The arrival of the long-awaited Cybertruck. A factory in Mexico. And a Tesla car that is affordable to many more people.These are among the announcements that Elon Musk, Tesla’s chief executive, might make Wednesday as he tries to reassure investors that the company can retain its crown as the world’s dominant maker of electric vehicles in the face of energetic competition from established carmakers and relatively younger Chinese manufacturers.In what has been billed as the company’s “Master Plan 3,” Mr. Musk is expected to confirm reports from recent weeks that Tesla will build a factory in Monterrey, Mexico, the company’s fifth car plant. President Andrés Manuel López Obrador of Mexico said on Tuesday that the company had decided to bui …
