HO HO HO that was slightly different (albeit misleading as fuck), since this time we have facts instead of the educated guesses we had prior to LoS' release. We know Gabriel's son is Trevor, and Alucard is still obviously the son of Dracula, and they have too much in common already to be 2 different people (Trevor mourning his mother's death & opposing Dracula is exactly Alucard's persona in the classic timeline, Trevor gets white hair/altered clothing, as does Alucard, both refer to Dracula as "father")
unless Dracula sired another child in those 25 years between LoS & MoF, but i doubt it, since he was in self-imposed exile according to the info we have & no one ever has ever got laid while they were in exile. i could be wrong tho
or the whole "separate evil from my body" thing occurs again