Williams, 36, won this year's Australian Open while pregnant and gave birth to a baby girl in September. She has not played a competition since, raising questions over whether the 23-time Grand Slam winner would attempt to defend her title next month.
But tournament director Craig Tiley is optimistic she will return for a crack at her seventh Melbourne Park crown after marrying Reddit co-founder Alexis Ohanian last month.
"She's got her visa, she's entered, she's practising and she's probably just got to find a bit more space for a bigger entourage," Melbourne's Herald Sun quoted him as saying.
Australian Court has 24 major titles, making her the most successful player in Grand Slam history.
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Tiley described the Australian Open, which will be held from January 15-28, as a "family-friendly event".
"We've had this before. Roger Federer travels with his four kids and we are a family-friendly event," he said, referring to Williams and her baby.
The winner of the 2018 tournament will walk away with Aus$4.0 million (US$3.0 million), up from Aus$3.7 million last year. The total tournament purse has risen 10 percent to Aus $55 million.
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