I'm coming up with a title for a song, and I thought "I'm a human, I will be a god" or "I'm human, I will be God" was pretty sweet sounding, but translating it into a short Latin saying would make it even better. Since I remember the word order "homo sum" from the famous humanist motto, I wonder if adding "Deus ero" after a simple comma would be correct? I came to this quite simply via analogy, since "ero" is the first person future form of "to be".
That works fine. The Romans might have done it in a different order:
Homo sum, ero deus.
You could also say
Homo sum, deus futurus.
This would be roughly "I am a man [who] is to be a god."
Yet another way to do this would be
Homo sum, fiam deus.
Which means "I am a man, I will become a god."
By the way, there's a great story about the emperor Vespasian told by the historian Suetonius. After Julius Caesar died, Roman emperors were considered, to a greater or lesser degree, to become divine when they died, at which point people worshipped them as gods. Vespasian's last words, according to Suetonius, were, "Væ, puto deus fio," which means, "Alas, I think I am becoming a god."