1st of all, I want to iron out the master and servant in this war.
I believe there only 7 servant as when Einzbern family summon Avenger, It replace berserker no add on 8th servant. So with this i think there only 7 servant in this war.
So who are the Seven Servant and their master
Saber (Good) - Edelfelt `s Old Sister (Confirmed)
Saber (Bad) - Edelfelt `s Young Sister (Confirmed)
Lancer (Fionn) - Darnic Yggdmillenia (Nazis) (Confirmed)
Assansin - Faldeus 's Relatives (Puppet Clan) (Confirmed)
Female Caster - Zouken Matou (Guess)
Einzbern - Avenger / Ruler (Confirmed)
(knight) Rider - Tohsaka (Guess)
Guess 1 - Servant Class
I suspect there no Archer in this holy grail war because Saber has taken up two slot of the Knight Class among the seven class. Therefore, I suspect no archer in this round. Second Proof come from the Photo attached. Behind standing two unknown master with their own servant.
Guess 2 - identity of the Masters
As we all know, only left two master with two servant. Judging by apperance, The Bald guy is Zouken Matou because there also information that Darnic battle Zouken during third holy grail war result in his leg getting injured. If Zouken is no a master, it seem to be not possible way to go toe to toe with Darnic who has a lancer servant. During that time, he is the head of Matou family which he has no heir anymore. So it fit right it as one of the seven master. Which left another master to be tohsaka family.
Guess 3 - identity of the Servant.
As for the Servant in the photo show a female standing behind him which has wield no weapon. Compare to another servant. This female is most likely a caster. As of another knight servant who wield the sword and wearing a helmet, i suggest it a rider instead of archer. As archer dont need helmet to protect theirselves. Only Mount unit need helmet. As of their identity, i have no possible way to guess. Only to know that rider is strong enough to beat saber and the female is strong enough to on par with lancer.
Guess 4 - Who die and Who Win
1st - Einzbern
2nd - Faudeus relatives
3rd - Zouken
4th - Older Sister of Edelfelt
5th - Darnic
6th - Young Sister of Edelfelt
Winner - Tohsaka
First we all know Einzbern lose first in this war, Then Tohsaka win the war and the second last standing is saber of the younger edelfelt. Three of these is confirmed. Judging Assansin ability, i suspect he will be the second one who lost follow by zouken. I rank zouken 3rd one to lose because between Darnic and him, Darnic `s lancer dead fight ruler which make him survive during the fight with zouken. That mean Zouken`s servant might not survive. Next i choose Older sister of Edelfelt lose the battle first because it say that she did not make it into the last two. But I give the 5th to lose to Darnic because, it stated there his lancer dead fighting and he manage to steal the greater grail which mean he is one of the last to survive.
Guess 5 - Nazi Vs Imperial.
i suspect the puppeteer word for the Imperial Army. There is a struggle between Nazis and Imperial Amry over the greater grail. In the end, Nazis win but betray by Darnic which lead to the Great holy grail war. But then, Faudes `s Clan use the puppeteer dead memory to recreate a false holy grail war in the snowfield. Which mean the puppeteer has intention to collect information of starting a holy grail war. In False Holy grail war, faudeus also working for government.
Guess 6 - battle style
Saber (Good) - Edelfelt `s Old Sister (Confirmed)
Saber (Bad) - Edelfelt `s Young Sister (Confirmed)
Lancer (Fionn) - Darnic Yggdmillenia (Nazis) (Confirmed)
Assansin - Faldeus 's Relatives (Puppet Clan) (Confirmed)
Female Caster - Zouken Matou (Guess)
Einzbern - Avenger / Ruler (Confirmed)
(knight) Rider - Tohsaka (Guess)
Judging from the pair, there a alliance between Edefelt Sister and they hunt other master in pair. This is their advantages until they break off. It unknown what lead to this. Secondly, Assansin Master is working for Imperial Army. His fighting tactic is having his servant hide among the puppet and give suprise attack with noble phantasm. Then, we go for Darnic. he has battle power back up by Nazis. What is Nazis speciality ?? create golem. I think Darnic has magician team from Nazis back him up and fighting using summon golem. Einzbern summon avenger and hoping to win the war but never though avenger has much fighting power. Einzbern put their bet on this servant which is their strategy for this war. I dont have much to go for Zouken and Tohsaka.
Judging from Caster + Zouken combination, i can only think of him summoning a lot of ugly insect familiar. During the photo of him VS Darnic, there are red eye in the black aura. Which mean he already a immortal body. with a fighting power of a caster.
That all i got at the moment.