Apex Legends: Known Leaked Hop-Ups
The Armorsmith hop-up is the most recently leaked and the one that has the most likely chance to make its arrival very soon. It allows a player's shield to be upgraded more easily, and will likely be on the Alternator and RE-45, just like Disruptor Rounds once were. These guns are unlikely to be used in the endgame, but this hop-up gives them more utility.
Heatsink is a hop-up leaked by datamined voice lines, but their actual use is unknown. That being said, it's likely to relate to L-Stars and Charge Rifles, as both these guns fire beams rather than bullets, so something to control their overheating are likely additions.
Incendiary rounds are a hop-up that was leaked all the way back in 2019, but have yet to show themselves. As the name suggests, it changes bullets into ones that deal fire damage. With Fuse coming this season, incendiary rounds could be in play. Then again, it's been so long it's possible these have been scrapped.
Apex Legends Season 8 will last three months, so expect it to end early May. We'll see if by then which hop-ups will be in rotation for Season 9.