Angela: "Her Sister's Keeper"
• Angela mentions that she visited Yggsgard where a skirmish recently took place, checked Midgard when S1 was happening, then Munnin told her Hela was the Queen in Black. Danny is in Niflheim and helps her (he gets escorted to Valhalla) and Angela heads off to Kun-Lun. This can go after Season 3 wraps up and it ends mentioning that the heroes are preparing for Doom's attack
Iron Fist: "Crossing the Sea of Stars"
• Picks up after the Gallery Card where Doom calls out Lie's claim to the Iron Fist, so it'll go after that once it's unlocked. This also goes after Angela's story since it recalls Shou-Lou's time asleep and the heroes waking him up before Doom could invade. (Assuming those are the events of the stage that's coming)
Loki: "Destined for Doom"
• Loki's been chosen by the Crane by this point so it should go after Iron Fist's new story and likely follows after the Gallery Card where the Champions get chosen
Team-Up Profile: "Divine Armory"
• Thor and Angela are training and she confirms that Thor hasn't taken back Yggsgard yet and coinciding with her story, it seems that the Yggsgard map ends with them confronting Loki then losing interest lmao. Thor mentions another Thor using Undrjarn like Angela's Ichors (Jane Foster reference). Not too many hints but since we know Angela is going to be in the tournament and they're sparring, I think this is the two of them getting Aldrif ready for the tournament so I'll put it after Loki's story
Team-Up Ability: "Arcane Order" (S4)
• Basically zero timeline indications beyond it being after the original Arcane Order. Strange says there's little time to master the Crimson Chains which hints at time crunch, so I think this takes place as the heroes are preparing for Doom's invasion of Kun-Lun. I'll place it before Angela's story
Team-Up Ability: "Gamma Charge" (S4)
• Namor gets mad about what he thinks are whale skeletons in his lab, so I'm assuming this happens while they're in Wakanda so I'll put it before Atlas Bond since aren't really any other timeline hints
Scroll of the Immortal Beasts: "Immortal Beast: Shou-Lou"
• Talks about Shou-Lou being the supreme immortal beast and that he's putting his trust in Lin Lie to stop Doom's schemes so I'll put it after his new story
Heart of the Dragon Gallery Card: "Let the Sleeping Dragon Lie"
• Can go before Angela's story since it's Shou-Lou talking about being asleep and Lin Lie returning to the heart of Heaven to defend against Doom
Heart of the Dragon Gallery Card: "Angel and Devil"
• By this point Angela is aware of Hela being kept safe in the Eighth City and it's basically her going to confront Daredevil (the trailer can also go here). It's kind of hard to place but I think the order goes Angela meeting the Heroes in her story, then heading to the sleeping Shou-Lou and fighting Daredevil here
Heart of the Dragon Gallery Card: "Raising the Stakes"
• Goes at the end of the Gallery Cards that are currently available/unlockable (teases Rogue and Gambit) and its Grandmaster thanking Shou-Lou for delaying the tournament
Collectible: "Tablet of Iron Fist"
• Talks about the ancient turtle carrying the scrolls talking about Iron Fists through the generations. I'll place it Pre-Entanglement before Galacta's Cosmic Tea