Yes. This will be in 5. It will be either 5.0 or 5.1. The call will really come down to the amount of time it takes to finish the basic stuff for 5.0. The new metamodel stuff is the utmost priority for 5.0 (and a main pre-requisite for this work btw). Gail Badner is currently working on getting that metamodel work (as far as it is done, from a dedicated branch) applied to master. Then we shall see.