New details about Version 4.6 of Genshin Impact have been leaked, and they point in a direction entirely different from the earlier Ruins of Remuria map expansion. Though there has always been an expectation that Fontaine would receive its final map expansion in Version 4.6, it would seem that Genshin Impact is content to break yet another pattern by releasing a zone closer to Bayda Harbor and the door to Khaenri'ah instead. Considering that leaks were pointing towards Cyno's second Story Quest being ready for Version 4.6, this pivot back to Sumeru makes a lot of sense in hindsight.
However, there are also two more factors to consider: Arlecchino is coming to Genshin Impact in Version 4.6, while Dainsleif is expected to make his annual appearance in either Version 4.6 or Version 4.7. Though Arlecchino could be getting a Story Quest on her own, there is also a possibility that she will instead play a role in an Interlude Chapter for Fontaine. Furthermore, there is currently no confirmation of a second Neuvillette or Furina Story Quest coming in Version 4.6.
The new information about Version 4.6 came from Uncle K and was shared on the Genshin Impact Leaks subreddit by Maobury, a regular contributor to both the Genshin Impact and Honkai Star Rail communities. The leak claims that the new zone in Version 4.6 will be located in the gap between Fontaine, Sumeru, and Liyue, seemingly where Bayda Harbor connects to Romaritime Harbor. Furthermore, the new artifact domain and weekly boss will both be located in the upcoming area, lending further credence to the leak that Cyno's second Story Quest will revolve around a new Trounce Boss in Genshin Impact.
While it's important to take leaks with a grain of salt, there appears to be a developed concept of a Bayda Harbor expansion at HoYoverse in which Cyno plays a pivotal role. According to Uncle K, the new area won't completely fill the empty parts of the Teyvat world map, as the ancient battlefields of Khaenri'ah will be reserved
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