One of the final shots of the video presented a title card for Phase Four, stylized as a blue circle with the number 4 overlaid on it — the iconic logo for the Fantastic Four.
It’s safe to say that the Fantastic Four is not only finally a part of the Marvel Cinematic Universe, but their official introduction to the franchise could come as early as 2023.
Now all that’s left is to hear about the X-Men.
Source: https://www.distractify.com/p/will-the-fantastic-four-be-in-the-mcu