I was wondering the feasibility of mapping a game like Adventure to a blog. Use hyperlinks to each action, etc. Wouldnt that be an intriguing project?

Jack could have killed Aku in the original battle, but didn’t manage to do it, and the result was Aku’s total domination of the earth for centuries. That is the key point.

When the time finally comes that Jack is permitted to return to his own time, then when he re-engages with Aku in the past, he’ll really win, and Aku will be dead and gone.

Though it shoudl be noted that Aku was defeated by Jack in the opener, and Aku threw Jack into the future before the killing blow. And everytime they are matched in the future, Jack wins and Aku flutters off. The only way to really defeat Aku is to completely obliterate him, and we’ve seen that there are Great Powers who could do the task but presumably dont for some prophetic reason.

Jack took on Aku in the past and didn’t win. If he returns to the past before he’s ready, and tries to take on Aku again, again he won’t win. That would be useless.

The guardian of the portal won’t let him pass until he’s strong enough and fast enough — and ruthless enough — to finish Aku off the next time they fight. In fact, it may be that he’ll have to prove that by killing Aku in the future. Then, and only then, will the guardian let him pass through the portal and return to the past.

If he kills Aku in the past, time changes, but that doesn’t mean the things he did in the future are wasted. They are part of his training, to make it possible for him to achieve the goal of killing Aku.