There are reports that Daimler and BMW may be considering joining forces to produce key components for future models. This collaboration would only be on parts that are not specific to each brand, and could include batteries and autonomous technology. Both company's plan on introducing at least 10 new EV models by 2025, so this could help to drastically reduce the cost and speed at which they can be produced. https://ca.finance.yahoo.com/news/bm...165736535.html
Its to both their benefit that they establish this kind of partnership. I think they've learned from the issues and struggles that EV brands like Tesla have faced in bringing EV's to market and they are taking every step they can to ensure they can stay on top of consumer demand.
There are still the main provider for Tesla, and are currently in the process of doubling their battery production over in China. That's going to be the hub for EV's so gaining market control there will be vitally important.
Its less of a race to market as it was with the first generation of electric vehicles. Component sharing is also going to become more common as most new platforms are fairly modular so each brand can adapt them accordingly.
I think its a matter of giving consumers options to figure out what they really want. These companies can do all the research they want but at the end of the day the real world is where they figure out what works.