Interesting but I don't see that happening, Kim i'd imagine will cut Jimmy or rather Saul from her life, in a big falling out where their relationship can't be repaired and they both go their separate ways, hence why we don't get a mention of her in BB. Now Howard's story might end up like that but he has been a background character as of late, so unless his storyline changes this season or the final season. Unless they write his story to go into the Gus' or Saul's I feel like his story is just gonna be a character that no longer is needed to continue into BB, I really don't see the writers shoehorning Howard into the drug business story, maybe if Gus' used HHM as a legal cover, but since they weren't mentioned when Gus' fall from grace happened, but they weren't and we saw what happen to businesses that were tied to Gus. I don't see Kim and Howard having a huge impact on the drug business storyline of BCS and BB.