I don't think it failed- I think Alex never died. I can't back it up, but Vaughan can legitimately back up anything. Also, if Vic dies, can't they jst jump start him in a Vision-esque way? I mean, minus the future armor and all that. But dying fior him is just like a motherboard crash for a computer. With some hard work, you can bring it back.
Also- you know how Kang in the future had obviously not heard about superheroes (or else he wouldn't have tried to fight them with all of his losses in the past being down in the record books)? Well, maybe this is because Victorious killed all the heroes in Heroine's timeline and the normal humans just erased hero-based history.
And, theoretically, couldn't Kang (possibly as a jealous Iron Lad[see: Young Avengers Special]) Come back from the future or a possible future with Victorious? That would be a sweet arc: Everyone vs. Victorious and a hundred Kangs(Magog style, baby!). Bring it the heck on.