I definitely think that Lena and Axel will happen in chapter 9 - the timing feels right for it, and Lena being at her parents house seems the right setting for him to show up to.
I don't think Cindy and Ian will happen yet, but I do think her changing her outfit is the indication she's falling more in line with the person Ian has encouraged her to become, and so subconsciously moving further towards him despite how she's gonna play the 'let's pretend it didn't happen, but I'm still dying to fuck you' game. Perhaps it might also be related to Axel's potential future route with her, if there's any content between them. Either way, it's bad news for Wade. I'm pretty sure that if this is Cindy's new standard outfit, Wade is gonna be totally 'wtf' about it. Cos we know he won't really step up his game to suit (or if he does, it won't last).
I think there's a pretty good chance there will be a sex scene between Allison x Ian, Cherry x Ian, Minerva x Ian and Holly x Ian. Possibly Jessica x Ian too.
I'd love Ivy x Ian, but I don't think we'll get that yet (but hopefully at some point).
No idea on Lena's front, besides Lena x Axel that is.