Are Hollyleaf Jayfeather and Lionblaze part of the prochecy?

Yes Jayfeather and lionblaze are part of the prophecy that was given to Firestar by skywacther(firestars quest) 'there will be three kin of you kin who will hold the power of the stars in their paws" Hollyleaf is not part of the prophecy though but jay feather and lion blaze are.