Draft schedules have been published. See this presentation.
I find it interesting that Foxboro is designated Zone 4 ($8.75 o/w; $281/month) vs Zone 6 for Mansfield ($10.50 o/w; $340/month). Foxboro will presumably draw many from Mansfield (residents at Mansfield with a sticker get parking for $3 which is a good deal vs $7 for non-residents), so the net result could be less crowding of NEC trains to/from Mansfield.
I find it interesting that Foxboro is designated Zone 4 ($8.75 o/w; $281/month) vs Zone 6 for Mansfield ($10.50 o/w; $340/month). Foxboro will presumably draw many from Mansfield (residents at Mansfield with a sticker get parking for $3 which is a good deal vs $7 for non-residents), so the net result could be less crowding of NEC trains to/from Mansfield.