Google is your friend.

• According to some rumours codename Hexe's main character will be a woman called Elsa. (Take this with a grain of salt)

• Ac Red's gameplay reveal might be in may according to some rumours

• There will be a multiplayer platform called Invictus which will be free

• You can load games really quickly as according to Insider Gaming who tested out AC Red loaded from the infinity hub to AC Red within seconds

• Ac Red will have something similar to the settlement system in Valhalla but it will be a Dojo according to a few leaks

• Ac Red will have combat stances

• You can go prone in AC Red

• A few famous figures will appear in AC Red

• Dual protagonists (Yasuke and Naoe)

• Yasuke will be the first playable protagonist to have actually existed.

I got this info off insider gaming and the YouTubers Jonathan (who is famous for his game leaks), The Hidden One and The Exile, who mainly said the leaks from Insider Gaming and Jonathan.

Also, according to a hidden "leak" that the Youtuber j0nathan, a French fella, very reliable in terms of leaks in the recent years, placed in one of his latest AC videos, Ezio will be returning in some way, now of course the game takes place in the 17th century which that by itself makes it impossible unless there is something related to him appearing at some point or maybe a hologram in a PoE. That is unknown.

You had my curiosity, now you have my attention

I heard that Red will be much more stealth-oriented than the previous RPG titles. Supposedly you can snuff torches to create shadows where you can hide and hiding in bushes and tall grass is also upgraded in some way.

Meanwhile, combat in Red is said to be more brutal than ever. You can decapitate enemies or severe their limbs like in Valhalla but the devs have made it even more gory this time.

Red will apparently have less mythology in it, but some elements related to Japanese mythology and folklore are still present. A recent leak said the game will include Yokai. They are kind of malevolent shape-shifting spirits or demons. Most likely the Yokai will connect into the Isu storyline somehow.

As for the present day element, it is tied to the Infinity platform and is mostly optional. The present day story is said to take place in the future this time, between 2090-2099. While Hexe will supposedly take this even further by going hundreds of years into the future.