Bale had been out with a calf injury before suffering a thigh problem, but he will feature against third-tier Fuenlebrada in the Copa del Rey.
The Wales forward, 28, has not played since Real's 3-1 Champions League win at Borussia Dortmund on 26 September.
"The idea is that tomorrow he can play and he looks good," said Zidane.
The Frenchman, who last week said he did not know when Bale would return to action, added: "As always he needs game time and how the matches go will determine what the best route for us to take is."
Bale, who missed the latter stages of Wales' unsuccessful World Cup qualifying campaign, has not played a single minute this season alongside Cristiano Ronaldo and Karim Benzema in Real's attack because either injury or suspension has affected all three.
"I want to see Gareth, Cristiano and Karim," said Zidane. "It has been a long time since I have seen them together."
Bale has scored 70 goals in 159 appearances for Real, winning three Champions Leagues and last season's La Liga title.
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