Beware of unmarked spoilers
Viv Vision
There will be an issue where Viv takes C.J. to meet Wiccan and Speed.
It's already been pointed out that all three of Vision's living children (in a manner of speaking) are LGBT so this could be a fun way to address this. Viv could ask her half-brothers about dating, especially since Billy is now married.- Jossed. Other comics may show the meeting at some point, but C.J. doesn't meet them in this arc.
Millie the Model
Harry's not really a S.H.I.E.L.D. agent - and Millie is really a spy
Harry doesn't like sharing information with Millie and casually shoots a prisoner. He's actually working for Hydra, A.I.M. or another nefarious organisation. Millie, on the other hand, seems competent and takes it all in her stride - she really is a S.H.I.E.L.D. agent, not the civilian he thinks, and she's manipulating him.