And what are they planning to pool resources and development on?
Why, EVs of course! Don't believe me? Read the press releases. They also want to coordinate development of software and infotainment screens. Recent history seems to suggest that car designers really suck at making software, so I don't expect progress to happen in that arena very quickly.
One piece castings that replace 70 stampings that all need to be welded or glued together? I think Toyota has started development of such but they are a long ways behind.