Blood of Apocalypse was a meh storyline, but consider this:

Apocalypse got taken by the Celestials because he owed them. He tried to die but they forced him to live. Bright flash of light and that's it.

Also, his clan knows that with his blood they could bring him back when he dies, but they cloned him instead. The clone doesn't have any if his memories and needed to be taught.

On top of that, when his blood brought him back before, he came back fully grown, but the clone was a child.

Why do that at all? Maybe they tried the usual method and it didn't work because he isn't dead.

What do you guys think?

I think those events have just been erased post-Age of X like Chamber's appearance.

@DevilMayehm666: doubtful of that since the events aren't connected. Age of X changed some things but not the whole history

@masterofevil: Angel becoming the new Apocalypse proves that wasn't a clone. So that's why I think its been erased.