Chavez, 58, returned home early Monday without warning and no fanfare after spending more than two months incommunicado in a Cuban hospital recovering from cancer surgery.
But his homecoming yielded little information about his state of health and is likely to revive speculation about who should be at the helm of the nation.
"We want to see him and we want him to tell Venezuela what his decision is," Omar Avila, the secretary general of the opposition Vision Venezuela political party, said in a statement. "Is he capable of governing the country or if he is going to step down due to the delicate state of his health?"
If Chavez were to resign or die it would trigger new elections within 30 days. Before he traveled to Cuba Dec. 10, the president asked the nation to rally behind Vice President Nicolas Maduro if new elections were needed. But since then, his followers have never acknowledged that the ailing comandante won't assume power.
Even so, some sort of transition is probably imminent, said Robert Bottome, an analyst and director of the Caracas-based Veneconomy publishing group.
While Chavez may have been brought home because he truly is recovering, Bottome said the government's thinking might also be that "he's deteriorating so fast we no longer have freedom of action, so let's bring him back right now before it's too late."
After winning an additional six-year term in October, the socialist firebrand missed his scheduled Jan. 10 inauguration as he battled his disease in Cuba. Even so, the Supreme Court ruled that he remained in charge and the ceremony could take place anytime he returned.
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