Rivian teases four new vehicles, and I have no idea what they are

I'll admit, I was too distracted by Rivian's surprise announcement of a $5 billion deal with Volkswagen to develop software and electric vehicles to notice that the buzzy California company was also planning an investor day event on June 27th. So when I woke up on Wednesday to see this shareholder letter — thanks to InsideEVs with an assist from BloombergNEF's Corey Cantor on Threads — I was pretty surprised to see Rivian was essentially taking a page from Tesla by teasing us with some shroud-covered mystery vehicles. Screenshot: Rivian So to toss into the mix four — four! —…