Within 10 years , there will only be 4-6 truly global car companies in the world and I am sure one of them will be German - based that incorporates brands in the current VW,Porsche,BMW and MBZ portfolios.
I see major consolidation leading to 1-2 large Chinese-based players, one Japanese, one South Korean , one US ( Ford ) and the above German. What's left and useful from GM will be swallowed by one of these . Maybe another " euro " firm with remnants of FIAT/Opel/Renault/Peugeot/Chrysler, with the smaller Asian/South Asian players brought in here and there mainly for their factories close to the huge China market.
The electric car companies forming now are all start ups that in their business plans hope to be bought by these firms for engineering patents .