The pair, Malele Atofu Paulo, also known as King Faipopo, and Lema'i Faioso Sione, are also facing a second charge of conspiracy to commit murder.
The two have been ordered to remain in custody until next Monday when they will appear for a plea hearing on the second charge.
The prosecution has opposed bail.
Meanwhile a third suspect, Taualai Leiloa, also known as Taualai Tuila'epa, has appeared separately on the same charge of conspiracy to commit murder.