Based on the revealed information, it seems that Genshin Impact will continue to open more banners according to the increasing number of new characters.
The new Genshin Impact rumors suggest that a future update from one of the Fontaine updates could have three banner phases. It has not yet been verified which update will include this change.

As of now, this game works on a two-stage banner system. If the leaked information is correct, it means that players will receive six character banners for each update once this change is rolled out. There is no guarantee that this information is correct. Likewise, not much is known about how long each of the three phases will last.
The first leak on the matter attracted a lot of attention. It just says that three banner phases will be integrated into Genshin Impact after one of the 4.X updates (“X” because it’s uncertain which update that will be).

Nothing else was revealed in these particular leaks. Prayer events in the current version of the game tend to last 21 days and that is with a system consisting of two stages. If the rumor turns out to be true, then it is likely that each banner period will last 14 days. However, there is still no concrete evidence of a timeframe for the upcoming prayer event change.
It was rumored that Genshin Impact 3.5 or 3.6 would introduce this change, but Travelers should know that at least not in 3.5. Newer info changed the updated version number from late 3.5/3.6 to 4.0+. Interestingly, there are more leaks related to the prayer event than just an increase in the number of Love Affair that players get in each update.

The post of a leaker in the sub Reddit Genshin Impact Leaks contains a useful translation of the above information belonging to Team China regarding some changes to the banners with the following content:
– Three phases for banners will be applied in Fontaine versions onwards
– This will happen before Genshin Impact 4.3
– Banner expansion rumors are usually correct
The Traveler already knew that version 3.6 would include Dehya in the regular banner, making the five-star count in it seven characters. New information suggests that there will be nine characters in that banner in patch 4.3.
>> MORE: Genshin Impact needs more variety among playable characters
Likely, a Water-type character from Fontaine will be one of the new characters added to the regular banner. Other rumors are that a Rock-type character with a cat-like appearance will fill the final spot.

It’s worth noting that Genshin Impact has seen some changes to its banner system before. For example, Version 2.3 introduced two character prayer events in a single stage, while previous updates only had one banner per stage. Likewise, versions 3.1 and 3.6 added Tighnari and Dehya to the regular banner’s five-star cast. So it wouldn’t be surprising if more banner stages were added to match the game’s growing roster with an already massive cast of characters.
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