During the Square Enix 2018 E3 conference, it was announced that Monster Hunter would crossover into the Final Fantasy XIV universe. In the trailer, we see a super stoked Palico approach a character who appears to be Auron from Final Fantasy. We then see that it is indeed another character dressed up as such and eventually zoom to an entire lineup of characters dressed in get-ups from various points in the franchise gearing up to take on a Rathalos.
The rest of the trailer showed off content and revealed the patch Under the Moonlight.
The collaboration and content will come to the game later this summer.