Nico Rosberg, an investor in the all-electric series, thinks Formula E could one day merge with Formula 1.
The 2016 world champion reckons it may be easier for motor racing's top open wheeler category to simple absorb Formula E rather than establish its own 'green' credentials.
'A big and difficult step'
"Maybe we will never even get to that point and we will just see a merger before that. The step for F1 to go electric will be a big and difficult one," said Rosberg when asked by the Washington Post if he thinks Formula E will one day eclipse F1.
McLaren refugee Stoffel Vandoorne is keeping his career alive with a move to Formula E next year.
And Rosberg thinks the time will eventually come when F1's combustion engines are completely dead.
"The advantage is that F1 and Formula E have the same owner," he said, referring to the Liberty companies headed by John Malone.