Self-driving car startup Zoox Inc. could be the next beneficiary of a shock and awe investment from SoftBank Group Corp.

Axios cites unnamed sources who said that the Menlo Park startup is in talks on a $1 billion funding round that would value it at between $3 billion and $4 billion.

That would be quite a leap for the startup which has raised about $250 million until now, most recently at a valuation of about $1.55 billion.

The talks are reportedly still in the preliminary stages and may not…