Potential spoilers (?) but more of just theory crafting after finishing 0.6 (Need to do my usual full game playthrough with the new update).
First off, based on the recency of updates, I'm willing to bet that we're looking at a December/January release for 0.7, which for once with these kinds of things, I'm okay with. This is worth the wait.
Now on to the theories (theory?) of how things are gonna play out.
So we all know there are the seven main girls, plus Calypso, yes, but for now I'm focusing on the seven we get profiles of. Obviously, endgame is to have a full happy harem that accepts each other and MC fully, as well as s** scenes for all of them all the way. With the number of times the MC and the girls have mentioned potential threesomes and beyond (Which I think is a similar thing that's happening to all of them with the physical changes or the water butterflys, Kredon ain't normal), Caribdis has for sure set us up for multi-girl scenes, which constitutes having slept with each one already (Or at least, the ones involved).
So far, we've obviously slept with Nancy and Alex, and Cari has set us up for Nova in 0.7 (if that One Piece sleepover ain't it, I'll eat my hat), potentially Annie and Dahlia not too far behind (Annie's whisper that next time is it and Dahlia's acceptance that she wants you to be the one in the shack). The stragglers are Penny and Luna, Luna even more than Penny, I'd say. Overall, mathwise, we're going to have to start sleeping with multiple girls per update (assuming the full game is 1.0. Honestly, most games I'd be upset with the idea of 1.0 not being full release, but Caribdis, if you want to take this all the way to 2.0, I'm here for a good time, and a long time if needed).
This all leads me to believe that 0.7 is going to have the opening resolution of the cliffhanger as Cari is want to do at this point, I could see Alex being taken away or something as part of this because her dad is... not good. We're either going to have one of the bases of El Coyote being raided (I'm going to guess we're taking Annie with us to Ion along with another girl and then I could see Luna and another girl, leaning Nova in my head, for our New World escapade, or else some of the girls and us go to one and the rest of the girls go to the other?) or else this "hunt" that has now been mentioned twice (Which I'm personally thinking won't happen until 0.8 and is going to lead into Dahlia's full scene).
Reason for one or the other is that the base raids are going to get us a third gem of doom and I think the hunt will be what wins us the fourth. Eventually we will need to face Thanatos and either defeat him or convince him to join us, which I could see at this point.
Obviously we'll have Nova's scene with the One Piece watch party (Still confused how they're watching the last episode, but ah well), I could just be fantasizing (I don't exactly recall how we left off with Penny, need to play through again to remember) but I could also see a side scene/date with Penny to the feudal japanese world.
Biggest thing I think is that we need to further our Luna connection this next update. We have all of one scene and whilst they're all great, it's (personally) one of the more forgettable ones.
Less of theory now and more just me being wistful, but based on Caribdis' growth (viewed by OIAL and now Eternum) I'm keeping my fingers crossed that we do get a polyamory confession scene or something? Like at some point there is very much a sit down between MC and all seven girls wherein he confesses he's seeing each of them (I can't get Nancy's reaction of "Oh, that's all you wanted to talk about? I thought it was serious." or something out of my head) and there's of course the anger then the realization that a lot of the girls like each other as well (beyond just friends. If they don't admit it, we all know they're lying). OIAL, whilst the ending slideshow is amazing, kind of just glances over it. Obviously some of the girls find out about each other and make a believable web of ones in-the-know and have different reactions, there's no full resolution or talk about it, it's just "Haha, and they all lived happily ever after, accepting each other with no issue or thought" kind of.
It would (again, personally) round out the whole "chosen family" that's occurred. All the girls have gotten closer due to MC and Cari has done a wonderful job of making sure those connections remain and grow themselves (ie Luna and Penny hanging at the mall, Penny and Nova being best buds in college, etc). Also, Nancy has apparently already accepted all of them as both MC's girlfriends as well as her own children to mother (Which I guess makes sense, Alex doesn't exactly have a loving family outside of maybe an Axel twist based on 0.6, she's already Penny and Dahlia's mom, she's acting as Annie's caretaker in Kredon, Luna lost her mom early on, leaving only Nova who, let's face it, is chaos).
To any who read this far, thank you for reading my ramble, feel free to reply with your thoughts if you too are spinning wild theories in your head along these lines?
Caribdis, if you read this (far), keep it up, I'm eagerly awaiting your next chapter, but still wish you to take the time you need to continue this masterpiece you've ensorcelled us with.
EDIT: Wow, I was tired and spelled Caribdis wrong every time.