Maybe. But if they do, I would expect the improvements to be minimal. Apple has only just caught up with production demand and there isn't much lacking on the current iPad2 in the CPU/GPU/RAM areas. I can't see Apple being ready for an RD display launch at the required scale for a $500 price point until next year.
That said It may make sense to offer a smaller upgrade now just to get the release cycle in line for Fall. This would bring the iPad more in sync with iOS releases, instead of the current situation of launching with a 9 month old OS.