New World Luffy at the Marineford War

Senario 1:

Could Luffy prevent the death of Ace and leave the war safely

Senario 2:

Could Luffy prevent the death of Ace and Whitebeard

Senario 3:

Could Luffy prevent the death of Ace and Whitebeard and also help the whitebread pirates win the War

Crazy Senario:

If the Whitebeard alliance have the aid of the entire New world grand fleet including the Stawhat and Heart Pirates. How would the war have Ended?

No, no, and no.

Possibly, if ace doesn't try to fight Akainu again. starts off with Haki to take out marine fodder and the whitebeards have an initial advantage.

Probably not.

Nope.

They might have gotten away, but I still see some people dying.

Yes; IIRC, Ace had to sacrifice himself because Luffy was not nearly prepared to fight on that level. After his 2 years of training he's much closer to that New World stage and was even powerful enough to take down Don Flamingo. Knowing Haki, he'll definitely be able to at least escape from Akainu by himself.

Yes; Ace survives because Luffy doesn't need his help to escape and Whiteboard survives because he never gets distracted by Aces death

No; They were already on the losing side anyways.

Bonus; They would have won

#1 Ace lives.

#2 Again Ace lives, Newgate dies. WB was always going to sacrifice himself and frankly he'd eventually ended up doing it regardless of Ace's situation. Remember the BB pirates were also there after his head.

#3 No. The Pirates would've lost had the battle continued. Newgate would've fallen and his commanders can hold their own but are not on the admirals tier as of then. Add the shichibukai being allied and it'd been a wrap.

#Bonus. This would only push Akainu into "necessary Justice" where he begins using actually dangerous attacks regardless of friendly fire for the greater good. I'm sure Sengoku would've sanctioned it as well, he wouldn't have let Marineford fall into the clutches of pirates. Which means Kizaru would've had a field day as well as Hancock and Doffy. Hell all the shichibukai.

1: No. Ace would have still been hot-headed and challenge Akainu.

2: No. Whitebeard intended to sacrifice himself from the get go.

3: No. The WB Pirates would still lose the war.

4: No. Still not enough.

Yes. Akainu would still have had Ace on the ropes, but Luffy wouldn't have needed Ace to sacrifice himself and they could of both lived.

No. Whitebeard was doomed from the get go.

No. They were losing either way.

I'd want to say it would be a tie based on who died first and who fought who. That said, Marines would still have the advantage.