Apple has yet to release any information on a supposed iPad Pro. Any information is speculation. I think Apple's focus right now is the watch, then this summer Broadwell laptops. That leaves the fall which is apple's typical time frame for iPads.
I disagree with this. There is still a chance for both an iPad Pro and Broadwell-based rMBA at the Spring event. Luckily we'll know for sure in less than 1 week.