I don't think the "no original research" rule would apply to a research journal that was hosted/sponsored/whatever by WMF. It's a reasonable rule for Wikipedia as an encyclopaedia but I don't think anyone (that mattered) would think it should apply to a research journal about Wikipedia, WMF, etc.
Should we be thinking of this journal as a new WMF project (a stablemate to Wikipedia, Wikiversity, etc)?
Kerry