It's become extremely difficult to guess at such things right now.

My only guesses would be that it's quite possible the Seanchan-Light conflict does not progress much at all in TOM. There won't be time for this... all of it would have to happen after the TGS timeline, and the post-TGS timeline is more likely going to be used to bridge to the reunion of the main cast which we know is in the book's climax (Brandon tends to exclude Tuon from it when he says "main cast" ). Unless there's gaps in the timeline and the climax of TOM is set long after Rand going to DM (I expect it will be set days, or weeks at most, for myself), then it would mean the Seanchan would have to be damn fast to learn Travelling and get ready to become involved with Rand/Egwene again.

So it looks like Rand and Egwene will have to deal with the Seanchan as the LB rages, just as Rand feared, just as it's been foreshadowed for books now (it also seems doubtful to me Jordan would solve all the conflicts within the Light before the last act. That'd be like the early collapse of all the Shadow's efforts to sow disorder and enmities before the LB even starts. What would be left for AMOL? Pages and pages of fighting Shadowspawn?)

Other than that, I think the Callandor/new sword/three plot point won't advance one bit in TOM.

Brandon has given hints that perhaps the BT story line won't be fully resolved in TOM, at least he implied he could stuff only some of Pevara's story in TOM and some will be in AMOL.

The Borderlanders? I'm undecided. This could be a plot twist involving Nynaeve, or Perrin/Faile, or they could also well be left to stew in Far Madding until Rand has time to deal with them again in AMOL. We'll see.

Not enough Moiraine? Well, I'm still pretty sure that's because Verin's 30 days kind of implies the expedition to rescue her will happen fairly late in the book, and IMO, Mat is at Ghenjei pretty much when Egwene has won the Tower and Rand is on DM... meaning... Moiraine appears pretty much only at the climax, doesn't have a earth-shattering role in it, and Jason longed for more scenes with her. I can't really see how Brandon could make a cliffhanger out of that: how could Mat be caught up at Ghenjei and involved in the climactic reunion all at the same time? I rather have the distinct impression he'll bring Moiraine to it....

Will Demandred be revealed? *shrugs*. It depends what he is up to, and if he gets involved in the "event that starts TG". If he is, it seems likely we'll know at last what he's up to. If he isn't.. well, I guess it might rather be Mesaana's turn in TOM, and Demandred will have to wait for the LB proper.

I'm actually more curious to see if Graendal will have time to resurface in TOM (there's not a whole lot of time between her escape and Rand going to DM), or if she too will reappear only in AMOL.