One thought that came to mind to me was depending on how well received the changes are, particularly the expanded dialogue from Kushner, whether or not we might see the incorporated into another revival some time in the future. Ivo van Hove's attempt might have left a bad taste in some mouths, but it probably didn't last long enough to taint the material. enough to stop an enterprising Producer from attempting to revive it again.
The Spielberg vs van Hove thing could make for some interesting analysis from the people who were able to see the latter. From what I understand attempted to make the material "relevant" by cutting an already short book even further and drawing blatant parallels with modern political events through his trademark projected video and such, while Spielberg and Kushner seem to be making it relevant by highlighting the social and economic context of the period when it was set, creating parallels with similar issues seen today.