Tensho said that White Fox was busy with other things (and later deleted that tweet). Pretty sure he was also hoping Rewrite would be done by White Fox. Seeing Re:Zero being done by White Fox, I do wish Rewrite was also being done by White Fox. Sure the designs in Re:Zero are quite simple compared to Rewrite, but the darkness in Re:Zero, and how White Fox handles it, would be suitable for Rewrite. Maybe a remake in the near future. We can always hope.
