My guess is when we will get more sidestories focused on how loyal or unfaithful MC will be. I also hope that Lana (Jill's sister) will become a bigger part of the story, considering she even had her own preview.
I've also read multiple times that Ep 11 should have either at least the amount of content or is at least as long (doesn't have to be the same thing) as 9 and 10 combined, but I don't know how much of that is true.
Only DPC knows the split between story and sex unfortunately.
it will be hardly as long as ep 9 and 10 combined. The render count is already fix, its about 15% more than ep.10... DPC is not known for recycling renders much, using the same renders over and over again can increase the playtime for an episode, but DPC doenst do that much. So you can fairly assume, the whole episode will be about the same length than ep 10 maybe 10-15% bigger. And of course it always depends which paths you are playing. Many people dont play the entire game and are only doing 1-2 paths. Like that you will miss a lot.
Other than that, its episode 11, not 15. And there is still a episode left in season 3. Episode 12 will conclude season 3.
So... episode 11 will be somewhat a "gapcloser" for the season 3 finale and the transition to season 4. Considering that, its most likely that we will NOT get many important answers. More like a "teaser" for this and that.
My guess is, some minor plots will kinda conclude, like the Beth-plot... it turns out that she just spread those pictures around copying them from the wall of shame just to spite the DIKs. And that she doesnt has anything to do with the Cathy cluck... and thats that. Maybe we will get some infos about Bellas past, but not that much. We will only get real answers there with the start of season 4 cause season 3 finale will be a "shocker" like the James comeback or something like that to stun the MC and than he wants answers. Of course DPC will create a big cliffhanger out of that for Season 4.
There will be a lot of hiccups between the DIKs because of the rumor that MC gave those pictures to the alphas blackmailing them, which of course was someone else... but dumb Ashley is listening to the even dumber Ant and MC and the DIKs have to deal with that during the episode. Nothing will come out of that though.
It would surprise me if we learn anything about the hidden Cam in Dereks closet. Its most likely tied to the mainplot involving Burke/Quinn and so on. Again, those important answers will not come before season 4.
The previews showed Lana, its time that MC and Jill will talk about her. Its not even certain if she is dead or just "away". And we will get some more infos about Jills past, maybe about her being bullied in the past and some things about her "charity project".
And of course... thanksgiving time. So a lot of meeting with people because of that. Maybe even Girlfriend-XY meets Neil? Its time for that.
Zoey will be a big part too, struggeling with her feelings about the MC. I would bet that she will make a move on him in this episode, if not it would be very weird.
Oh and some more things for a Josy Solo path will happen too. Depending on the path, it nearly happended that she cheated with the MC. There will be at least a full on make out session between them on the "Josy feelings path" for sure.
Overall, i wouldnt get my hopes up that high to get some REAL important answers to the main-questions. After episode 11 there are still at least 5 episodes left, maybe another interlude between season 3 and 4 will come too. A lot of Storytelling left, not the time to answer heavy questions, more teasing in that area and cliffhanger.
*Edit* oh, forgot about Rio of course... the whole thing will be dealt with an open ending i think. Nothing major will happen to her, and we will not really get to see what happended with her. Vinny and Buddy will "force" her to spy for them or something like that. Quinn will not help her and Rio finally sees that she cant be in her corner anymore... if she is close to the MC in your playthrough, she might involve him, otherwise she will deal with that alone.