Feiglin enjoys the support of 1,000-15,000 Likud members who share his ideology. The past year has also seen him win the support of many ministers and MKs following an image overhaul.
On Wednesday, the Likud convention will give the final approval for the date and the internal election method. Senior Likud officials have criticized Netanyahu's decision not to attend the convention.
Of the party's 27 MKs, five to seven stand to lose their Knesset seats. On Monday, Minister Moshe Kahlon announced he will not seek another term.
Meanwhile, the Labor party has announced it has hired Stanley Greenberg as the party's chief strategic advisor for the election campaign.
A former consultant for Bill Clinton and Tony Blair, Greenberg is familiar with Israeli politics having previously served as Ehud Barak's consultant during the 1999 election campaign. He is scheduled to arrive in Israel on Thursday to meet Labor Chairwoman Shelly Yachimovich.
Tzvika Brot contributed to this report
- Receive Ynetnews updates
directly to your desktop