The spoilers around at the moment for the next two weeks don't mention Ross at all (just more storyline secrecy). Debbie gets mentioned once in the ITV spoiler:
7289 Friday 11 September 7pm – 7.30pm Sarah’s anger forces Debbie to take action
Lawrence asked Ross if the money was for something "highly illegal?". Ross said "You don't want to know, believe me" and "You give me the money, I do what I have to do, and that's the end of it." (sounds like a proper gangster!)
I suspect that the money could involve a plan Ross has to do with using Moses to get back into Debbie's life, as yesterday's episode script talked several times about everything being "all about the kids now", for Debbie and Cain anyway.
Debbie told Ross it was over between them by saying "I nearly died [of injuries from the village hall]. My kids would have had to grow up without their mum. I can't go on living just for me. I have to do the best for them, nothing else can get in the way. For Sarah, for Jack, for everyone. This has got to end. That's it. It's over."
Afterwards, she went to the pub and told Cain "I'm moving on. You know like you said, it's all about the kids now and that's all I'm thinking about."
I can't see Debbie or Ross leaving the village very soon, as Ross has only just come back and it is too soon for Debbie's maternity leave.
Ross' plan could be anything, nice or nasty, but Ross is still desperate to get Debbie. Ross could just be the 'doting dad', buy a smart baby-buggy and use Moses as a 'little brother' for Sarah and Jack to love so he can get back with Debbie this way, but whatever Ross' plan is, I think it could be the starting point for Debbie's exit scenes, though, so it could be something big, even shocking. The biggest and nastiest scenario I can think of right now is some sort of disappearance plot (like using a secret baby-sitter and Ross pretending a kidnap has happened), but surely even Ross wouldn't pay to make this happen would he? If so, would he frame Pete as being involved?
Emmerdale Twitter account has some tweets of ideas about what Ross could be up to at:
https://twitter.com/emmerdale/status/637330570796658689