Season Two of The Division 2 is coming to a close soon and Massive Entertainment outlined what seasonal content will be available afterwards and what will go away for a while.
Hornet has had his rerun after returning from the dead and many SHD agents successfully took him down once again. His time in the spotlight is coming to an end soon and the devs made the prime target available along with the other four Manhunt targets so the players can have a go at them again.
Keep in mind that you will need to eliminate the four regular targets before taking on Hornet even though they are all available. The barrier removal only means that the time gating is gone. Furthermore, if you reset your Manhunt progress at some point during the season, it will be the same as never having done it in the first place so all four regular targets will need to be eliminated first.
With no time gating around, this is probably the best time to get the Repair Trap skill variation, which is awarded upon defeating Hornet. Those who don't manage to get it this way will have their opportunities in the next season but Massive didn't specify how the players will be able to acquire this particular ability.
Seasonal gear like Eclipse Protocol Set will be made available through gameplay in the future in case you didn't get it this season.
Cosmetic items, however, will not be available after Keener's Legacy ends. Those looking to go through seasonal levels faster will be able to do so with the Instant Unlocks in the store.