Both Final Fantasy XIV and Monster Hunter: World are known for frequently hosting crossover events with other games. Now content from Monster Hunter World is coming to Final Fantasy XIV.
During the E3 conference by Square Enix, some features of the upcoming coop event between Monster Hunter World and Final Fantasy XIV were teased in a trailer.
Palico companions and Rathalos are coming to Final Fantasy XIV
It can be assumed that the Warriors of Light will receive the Palico from MHW as a companion in FFXIV.

Monster Hunter fans in Final Fantasy XIV can also look forward to battling a Rathalos, which will likely appear either as a FATE boss or as part of a quest line in FFXIV.

Monster Hunter players will also receive an FFXIV event in MHW where they will face Behemoth.
The event is said to take place during the summer, according to Square Enix.