Dataminer That1MiningGuy found what can be the next Heirloom set in the game files. It appears that Octane is the lucky one this time. Various discussions took place during the release of old Heirloom sets concerning the fact that the Apex Legends community wanted more melee items. Some have speculated about Octane's leg, but it seems that this isn't what Respawn has decided to do since the file mentions a 'knife'.
Xbox One Exclusive Cosmetic Leak
An exclusive pack for Xbox One players will be available soon. Respawn hasn't communicated on it yet, but Microsoft has already done the work. Here is a detail of the rewards — and it could even be possible to see the same kind of pack for PS4 players.
These are obviously only speculations, nothing has really been confirmed by Respawn.