The shocking ending in Final Fantasy 7 Remake has created some confusion for fans regarding the new timeline. The events that occurred within the original Final Fantasy 7 game are still canon to the overall story, as glimpses of the original timeline were shown during the final battle with the Whispers. This confirms that FF7 Remake exists within a separate branch in time and that future events will be different. With Tetsuya Nomura's alternate timelines and multiverses, it's possible Final Fantasy 7 Remake Part 2 can connect with Kingdom Hearts 4.
Tetsuya Nomura is known for adding new franchises to the Kingdom Hearts universe. The combination of Disney and Final Fantasy characters created an expansive world, but Nomura didn't stop there. In Kingdom Hearts: Dream Drop Distance, characters like Neku and Shiki from The World Ends With You, were included within the story. In Kingdom Hearts 3 and its ReMind DLC, a new character named Yozora was introduced. Yozora has a strong resemblance to Noctis from Final Fantasy 15, which led to fans theorizing that Nomura's Final Fantasy Versus XIII is somehow connected to Kingdom Hearts.
Final Fantasy 7 characters like Cloud, Aerith, and Sephiroth already exist within the world of Kingdom Hearts. The characters aren't related to the original game, but instead have their own unique stories within the Kingdom Hearts lore. Sephiroth is said to be the embodiment of Cloud's darkness while Aerith, along with the other Final Fantasy characters, helps Sora throughout his journey. The alternate branch in timelines presented in Final Fantasy 7 Remake could mean there is a multiverse, where different versions of the same characters exist.
Final Fantasy 7 Remake: A Possible Multiverse With Kingdom Hearts
The ending of FF7 Remake added a new scene of Zack Fair surviving his encounter with the Shinra Army. In the INTERmission DLC for Final Fantasy 7 Remake, Zack was seen carrying the Buster Sword. This shouldn't be possible since Cloud was using the sword during the events of FF7 Remake. In the original events of Crisis Core, the Buster Sword is a one-of-a-kind weapon used by Angeal who passed the sword down to Zack. During Zack's final moments, he gave the Buster Sword to Cloud before succumbing to his wounds inflicted by the Shinra soldiers. The existence of two Buster Swords could suggest there are two Zacks in FF7 Remake: the Zack who fell in battle and the other Zack players saw in the INTERmission DLC.
The possibility of a multiverse could lead to a merging timeline between FF7 Remake and Kingdom Hearts. Characters like Cloud from the Remake timeline can appear in Kingdom Hearts 4. Fighting side by side with two different versions of Cloud could be possible, as Nomura continues to create more alternate universes that can be expanded into KH's lore. Final Fantasy 7 Remake Part 2 may explain more about the branching timelines and how it started. With the existence of different timelines and worlds, the story can eventually develop into a big Square Enix multiverse. As gamers wait for the sequel games, only time will tell whether the multiverse theory is true or not.