California: Tom Steyer in the mentioning category for a replacement race

We've been talking about a big time Democrat getting into the replacement race and I'm not sure that Tom Steyer qualifies. Steyer was a candidate for President where he spent $131 Million for no delegates and a little over 250,000 votes. He has now commissioned a poll with himself as the replacement candidate. As I mentioned earlier, there could be a heavy penalty for the candidate who jumps into the race.