[Update]: Syberia: The World Before, the final game in the series Benoît Sokal worked on himself, is coming to PC on March 18th, 2022.
Syberia 3 is an upcoming story-focused 3D adventure game set in a deep and mysterious universe. It is coming more than thirteen years after its predecessor Syberia 2, but worry not as it will tell a completely different tale than the previous two games. Prior knowledge is definitely going to be helpful, but it will not be mandatory in your enjoyment of the story.
And speaking of which, if you're interested in seeing what Syberia 3 has to offer in terms of lore and storytelling you'll find the recently posted trailer down below. There are some potentially minor spoilers in there, but unless you really want to have a pure playthrough I think you'll be just fine. Here's the video:
Syberia 3 is set to arrive this April 25th, and if you would like to learn more I would recommend heading over to either Steam or the official website. On the other hand, if you would like to give Syberia 2 a try ahead of release and potentially gain a deeper understanding of the lore, you'll be glad to hear that its currently 100% free on Origin! The promotion will only last for a limited time, and with no date given I would recommend grabbing it as soon as possible, just to be on the safe side. Enjoy!