Although Nonaka is out that doesn't that our interest in Cotto's next bout is dead, instead it seems like Cotto will be facing Nonaka's countryman Yoshihiro Kamegai (27-3-2, 24) [亀海喜寛] on June 24th at the Barclays Center in Brooklyn, New York.
Although Nonaka, and his fans, will feel disappointed in the fact his name was linked to a Cotto bout and then dropped, almost in the blink of the eye, it's fair to say that a Cotto Vs Kamegai bout would mean more, and would likely be very entertaining.
Of course Cotto will be strongly favoured against Kamegai but with Kamegai's ability to make even a one sided loss fun to watch it'll likely be hard to not be at least a little bit entertained by the contest. Of course Kamegai is well known in the West, having faced a string of notable names and having been in several FOTY candidates, two of which came against Jesus Soto Karass, and for Cotto it makes a lot more sense to face Kamegai, in an all action fan friendly bout, than to face Nonaka, an unknown outside of Japan.
The story is still not confirmed but sources in in Puerto Rico, including http://elvocero.com/, seem confident that the bout is a done deal and will be announced in the near future with ROC Nation being the promoter of the event.