The cause of everyone's death on the new planet in the daily comic could be anything from a natural catastrophe like a massive asteroid impact to some sort of internal conflict among the inhabitants. We just have to wait and see how the comic unfolds to find out for sure.
Chapter 117, "Teng Jiao Saliva and Poison Source [Combined Chapters]", is the clearest early answer because it turns Camp Supply Station's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Although Xia Hong understood this principle, he had no way to improve... and follows through with To be personally commended by the leader, you three are quite lucky."....
Chapter 106, "Expand the Hunting Grounds, Camp Expansion [3-in-1]", is the clearest early answer because it turns Xia Chuan's situation into a concrete plot event. It opens with With weapons in the Logging Realm, at most you gain some self-defense... and closes on Among the three Zhao brothers, Zhao Hu had the most impulsive....
Chapter 83, "Creating an Echo Chamber", is the clearest early answer because it turns Cold Beasts's situation into a concrete plot event. It opens with After several disasters, coupled with the recent encounter with the... and closes on No, even decades are unlikely, as they still need consumption..
A practical answer is Chapter 796, because it turns the idea into a concrete scene. The chapter opens with These warships were designed to withstand the harsh conditions of space..., adds pressure through Everything around him suggested that he was a child of a wealthy family,..., and ends on.
Chapter 527, "But I'm Not Complaining", is the clearest early answer because it turns Damien's situation into a concrete plot event. It opens with The scouts arrived hours after the battle. and closes on Bird-like mana creatures skimmed across the surface before darting.... The key payoff is that the chapter closes with Especially when dealing with enemies that preferred the sky., which gives But I'm Not Complaining a stronger narrative position and pushes the power growth onward.
Chapter 137, "Attempt to Breakthrough, Dispute [Trinity]", is the clearest early answer because Snow Mane finally turns buildup into a real advancement. The setup is Hiss..." "What a large Snow Mane, how can it be so big?" "This is an..., but the pressure keeps building through At the Great Xia Station, as Xia Hong led the team back to the....
Chapter 183, "Population Explosion, Valley Planning", is the clearest early answer because it turns Zhuhe Camp's situation into a concrete plot event. The chapter gives readers a real answer by opening on With the lessons of the past, Xia Chuan doesn't dare to be careless... and ending on From the aspect of deterring deceitful monsters, Great Xia indeed has....
Chapter 154, "Inheritance Rights, Strategic Contraction [Sorry for Being Late]", is the clearest early answer because Li Pingkai gets a payoff that changes the stakes. A useful checkpoint is the way the scene starts with This is also the most direct reason for the deaths of Li Yun and Li... and follows through with Let's just wait and watch how they meet their end." "Rising from the....
Chapter 501, "So That's How You Work", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is The Forest of Twin Disasters did not sleep., but the pressure keeps building through Mist clung low to the ground, curling around roots and broken stone,....
Chapter 45, "My name is Xia Hong, the Great Xia Leader [Here He Comes]", is the clearest early answer because it turns Great Xia's situation into a concrete plot event. The chapter gives readers a real answer by opening on As soon as night fell on the second day, Shi Qing went to find Luo... and ending on Even Rogel Camp couldn't possibly have five Loggers so young..