As long as she's physically up to it, I'm here for rescheduling the cancelled dates for summer with the ARTPOP lead a la MB/BTW.
It'd build up coverage/hype for ARTPOP, allow her to finish the tour off properly, get dat gross, maybe film it and possibly upgrade to a stadium in NYC?
I don't see why there'd be a problem. The dates would simply be rescheduled shows following an injury hiatus.
If she was renaming the tour or changing the setlist/staging substantially, or it came a year later, then maybe there'd be an issue...but if nothing else, these dates would just be a mini-leg following a break. It's the same tour.