Now that we know all of the player cards from the first three packs, I thought it might be worth reviewing what we know about the remaining packs. Four is Faramir covers the basics, but there are a few details that we can piece together. Some of this involves speculation, but I'll be clear about when information isn't 100% solid.
The Drowned Ruins
The Drowned Ruins is the pack we know most about: there are likely only two player cards in it whose names are unknown, and we even have some info about those cards.
Argalad: 4 hitpoints and partial text spoilers
Dwarven Sellsword (83)
? [perhaps Leadership event for decks with 2 or fewer heroes]
Marksman of Lorien (85)
? [perhaps Dúnedain support Tactics card]
Woodland Courier (87)
Hithlain (88)
? [very likely Robin Smallburrow]
Interrogation: ability unknown [almost certainly trap support]
Strider (91)
The announcement article says:
you'll find new cards for your favorite Hobbit, Dúnedain, and Trap decks
a new Hobbit ally, and a couple of cards that may allow you to traverse even these strange and deadly tunnels with fewer than three heroes…
Based on the art and the fact that it's Lore, Interrogation is almost certainly the trap support. Robin Smallburrow was spoiled when the cycle was announced. Theoretically, he could be in a later pack and another hobbit ally in this pack. However, FFG has never released two allies from the same sphere in the same adventure pack. Since we already have Leadership, Tactics and Spirit allies spoiled for this pack (as well as a neutral card spoiled) the hobbit ally is likely Lore. By the same reasoning, Robin Smallburrow is unlikely to show up in A Storm on Cobas Haven (which has Ioreth as a Lore ally) and is not very likely to show up in The City of Corsairs, which already has four non-Hobbit allies. My guess is that the unknown Leadership card is the second card in the pack to support 2 hero decks (it doesn't seem like it would fit in Tactics, and I doubt that Inerrogation would be it). There's a chance that the card that supports 2 hero decks or Interrogation also supports Dunedain decks, but it seems more likely that the unknown Tactics card supports Dunedain decks.
A Storm on Cobas Haven
We know much less about A Storm on Cobas Haven. The announcement article mentions that this pack has 10 player cards aside from the hero, like Flight of the Stormcaller did. The announcement article for The City of Corsairs doesn't mention how many player cards are in that pack, but Prince Imrahil is numbered 138 and Prince of Dol Amroth is numbered 146, so the pack only has 7 cards among Leadership, Tactics, Spirit and Lore. It seems likely that whatever sphere gets only one card in the last pack will get three cards in A Storm on Cobas Haven.
an assortment of ten different player cards, a good portion of which focus on combat and healing.
thirty new player cards (three copies each of ten different cards), many of which reinforce the Dream-chaser cycle's focus on powerful allies and secondary effects that can be paid for by the group as a whole.
This refers back to the cycle's announcement, which said:
As a whole, the cycle boasts a high concentration of expensive and unique allies, who come with powerful effects that we expect will excite you to play with them.
So far we've seen Glorfindel, Eldahir, Azain Silverbeard, and Déorwine who clearly fit this description. Sam Gamgee, Ceorl, Robin Smallburrow, and Ioreth are less expensive unique allies with generally powerful effects. There are also some expensive non-unique powerful allies, like Guardian of Rivendell and Knight of the White Tower. Linhir Sea-captain is neither expensive nor unique, and Ioreth is not expensive, so there's a good chance that we'll get a expensive powerful unique ally in Leadership or Tactics (or both) in this pack. Personally, I would love to see an ally version of Aragorn or ally versions of the twins.
The City of Corsairs
The final pack also has several cards that we know nothing about. It's difficult to tell what the number for Inspiring Presence is (spoiled in the announcement for Flight of the Stormcaller). It looks like 140, but that doesn't really make sense: adventure pack numbering is consistently in the order of Leadership, Tactics, Spirit, Lore, and finally neutral, so that would suggest that Knight of the White Tower is the only Leadership card and there are no Tactics cards. It looks a little bit like 142, which could work if there's one Leadership card and two Tactics cards (or vice versa) and Inspiring Presence is the first Spirit card. However, there's a partially spoiled Spirit ally, and allies typically come before attachments and events from their sphere (there are occasional exceptions: Heir of Mardil comes before Orophin, perhaps because Heir of Mardil come right after Galadriel and can work on her). It's also possible that the numbering changed after the announcement of Flight of the Stormcaller.
The partially spoiled Spirit ally comes from a card fan in French that was posted on the discord spoilers chat on May 18. I can't find the image on Edge's website; I'm guessing it was taken down because it was spoiling cards before FFG had announced the last pack. The Spanish fan that spoiled Na'asiyah was posted at the same time and is on Four is Faramir, but this fan wasn't copied there. Here it is (contains some quest spoilers, especially if you understand French):

Súlien (possibly a different name in translation) is a Dúnedain scout. The announcement article says that this pack contains three new Gondor allies. If Inspiring Presence is 142, we'll likely see:
About a quarter of the cards in the Dream-chaser cycle have effects that can be boosted through the expenditure of additional resources.
Every single combination of spheres has a card in the Dream-chaser cycle that can be boosted in this way. It was a lot of fun to both dream up effects that would encourage players to pool their resources, as well as the combinations of effects that married the themes of two spheres together.