Create a SOLO seal. As many videos players completing objective solo
Also bring back hidden ghosts to hunt down weather throughout the traveler and/or system. Set up the similar way as D1
Complete all these solo:
The season/epsiode story solo
Complete different master lost sectors flawless
Complete X amount of legend lost sectors flawless
One or more dungeons (don't need to be flawless)
A non match made Nightfall
Win X amount of trials matches without a fireteam (just join on randoms)
Etc