I expect none. "issues" that is. Just the normal stuff. In terms of the X535d, the 2010 will be the last year and we can hope they've figured it out!
I am not a maintenance guy for two reasons: 1) I do a better job than BMW and I do it more often that BMW's paltry plan offers, and 2) Since I do my own it is much cheaper than paying their amazing prices for oil changes and brake service. The maintenance plan is masterful in that it 'ties' owners to the BMW service process... preventing them from finding alternatives.
On the other hand, I tend to like warranties- but then I am under the car pretty often and can bring a pretty thorough punch list in to ensure I get my money's worth.