I know there are some ER2 traders here, so make sure you follow how this progresses and what changes you need to make in order to keep trading the ER2 when it's at the ICE.
Coincidentally, the CME had an announcement as well:
CME and S&P Announce New E-mini Small Cap Stock Index Futures Contracts
Chicago Mercantile Exchange MediaRoom - News Releases
Hmmmm.... A small cap E-mini... why would they do that?
My guess is that this new E-mini coupled with a S&P 400 E-mini push, the CME is hoping to keep ER2 traders there. Problem is that the new e-mini is just that, new, and the S&P 400 has yet to get some good volume. Time will tell.