They have made it clear we will not get aqua shadow missions. They will probably be selling the shadow fragments as a possible rare drop from the wednesday deal soon. I would expect it to be about 3-5% chance of getting a fragment, and if you get one.... probably 40% 2* fragment, 30 % 3* fragment, 20% 4* fragment, 8% 5* and probably a 2% chance of a 6* fragment.