The bout has been ordered due to Francisco Vargas being injured, still, from his recent war with Orlando Salido, though he had been the target of Miura's before this order, which seems to suit all 3 men perfectly. Letting Vargas rest whilst letting Roman and Miura stay active and set up a bout for the world title in the near future.
The two camps will begin talks next week, though Roman has stated he's happy to travel to Japan for the bout if he needs to and has seemingly opened to door to fighting in Miura's homeland. Alternatively their is some speculation that the bout could take place in the US with Miura looking to build on his popularity following his 2015 FOTY bout with Vargas.
We have long been told that Miura was looking to return to the ring in September and that sort of date would still be possible, despite the fact that Roman fought this past weekend, scoring a 3rd round TKO over Jerope Mercado.
With the teams told to negotiate we suspect the bout will be announced relatively shortly with both men wanting the bout sooner rather than later.