I think the original claim was for it to be 'one go' and it would take '4 continuous hours' to complete. To give it that epic feeling.
Unless of course you fight a big bad scary monster at the end that one-shots everyone, and will take 20 attempts to find a winning strategy.
Only to find out it was the mid boss >.>
I forsee many problems with this approach, although I do like the idea and the concept of 'epicness' behind a long drawn out battle.
