The ninja go to missions across the merged lands
1-Cole and Euphrasia go to the whispering woods to ask the arc dragon of life if she senses whether Lloyd is alive or not(as they suggest that if the master of life did truly die and pass on his elemental powers she'll sense it)
2-Kai and Arin go to the spectral lands to ask the departed spirits there if they saw Lloyd's spirit pass there(and they run into Morro and Egalt)
3-they reveal that General Cryptor was shut down and locked up in a cell in crypterium prison so Zane, Pixel and sora go to go hack his core system to see if he and the loyalists had or still have any backup plans,as well as any other information that can be vital to them and maybe something happens with them in crypterium prison and once Beatrix and the loyalists are out of the picture the writers will drop that plot(at least until maybe the next series)
4-jay goes to learn about the artifact from his memory from his parents or Kai and Nya's parents(since they were in that memory) or from the cloud kingdom's library or maybe from Misako since she's a researcher and she has known Wu most of her life perhaps Wu had told her about the medallion