I think that's extremely unlikely. I feel like if Doc said that, he was saying it in the spirit of "anyone can earn a starting role if he plays hard" type mentality.
I think if Doc and Danny really thought that Sullinger was going to start right away, they wouldn't have given Bass the contract that they did. That doesn't mean Sullinger won't eventually win it, but I can't imagine the team committing that type of money to Bass (especially with Green vying for minutes at the 4) if they were that confident in Sullinger.
That said, I think the bigger threat to Bass's starting job is Green. Like it or not, I think there's a shot Green beats him out for the starting 4 spot. Regardless of that, he should play substantial time there.