Max spent time with Derek (Jamie Foreman) away from Albert Square late last year after on-off partner Tanya had rejected him. Despite hints that the siblings were getting up to no good, viewers have not yet discovered the full story of what went on.
However, Wood has now told Inside Soap that the truth will be revealed in the coming months.
Wood commented: "The story will emerge - and it's incredibly exciting. There's a story concerning Max and Derek which is set to be long-running, and everything will be explained.
"Jamie Foreman and I are in on it, and we've got a firm sense of what Max and Derek got up to."
The actor also expressed delight over the way Derek has shaken up life for the Branning family in recent months.
He said: "Jamie is fantastic to work with. He's had a huge impact on the show."
> EastEnders: Is Max hiding a secret?
> EastEnders: Will Roxy come between Max and Tanya?
> Read more EastEnders spoilers and news
Watch Max's EastEnders character trail below: