Samsung is set to introduce the phone in late Q1 and ship in early Q4 or very late Q1 - mid-March. The Galaxy S9 and S9+ were announced a day before the Mobile World Congress 2019 on February 25 but they shipped on March 11 to March 16, depending on the country.
This time things might happen a few weeks later but in a very similar time frame. Yes, we have a rock-solid confirmation that the Galaxy S10 will launch with two different SoCs. The Exynos 8920 version will ship predominantly in Europe and once again curse Europeans with the weaker of the two devices. The US and some of China will get the Snapdragon 855. It will be interesting to compare 8nm Samsung chip versus 7nm Qualcomm chip as we heard that Snapdragon is doing a great job in AI compared to the competition.
The phone is a big leap forward, especially in camera, display design and will stand out from evolutionary designs of the S9 that reminded us a lot of the Galaxy S8.