I wasn't going to comment on the forums again - well at least not for some while - but my love of GoT brought me back to continue the conversation here.
Yes, the White Walkers seem to have a numbers advantage, but the kingdom leaders seem to realise the danger they're in and have banded behind Jon Snow and Dani.....except for Cersei. She believes she has the safety of numbers and distance to survive what seems an inevitable war. However, her ally in the [now] commander of the Iron Fleet is untrustworty and my yet betray her for another [lucrative] quest. The other possibility there is that his cousin may yet retake the fleet [with the 200,000 troops aboard] and sail North to assist in the war there.
Those are 'supposes', however, and may not come to fruition. On the side of the allies, there is Dragonglass and fire, the only two known elements to destroy White Walkers. With all their weapons now forged with dragonglass, they do have an advantage. Well at least the odds are evened, and then there's the remaining two dragons, who I'm sure will be more careful in battle after their brother was downed by the Night King.
After watching this week's installment I am evermore hopeful that Winterfell will drive back the White Walker onslaught and buy the seven kingdoms more time to prepare for the final battle, which by then sees the allies in a much stronger position and strong enough to defeat the undead army. One event of this week's episode that leads me to think that is Jon telling Dani who he really is... the true heir to the Iron throne. I believe Dani will tell Sansa Stark this to help heal their frosty relations, in the hope that Sansa will then throw her 100% support behind the effort to defeat the White Walkers.
Another element on the side of the allies is Bran Stark. Surprise! Surprise! Yes, the young man in the wheelchair. As Bran said in the last episode, the Night King fears him... not for his fighting ability but for his mind, which I believe is capable of destroying the Night King.
I also think, given GoT is based on the novel series 'A Song Of Fire and Ice', that the allies under Jon Snow will be victorious because fire will always destroy ice. Well that's my theory - because fire will always melt ice in a face to face confrontation. Besides, the writers have given us several characters to love and follow, so why kill them all off and disappoint millions of fans? Yes, some characters may perish in the battle, but I think that the key characters we have come to love will survive and forge a new kingdom under the Iron Throne.
Anyway, that's it for now.... back to you.