Steven Goff, over at Soccer Insider reported a few days ago that it looked like MLS was going to dumping their senior/youth international distinction for foreign players, instead going with a foreigner or not approach. According to Goff MLS teams will have 8 foreign slots with no age restrictions starting next season.
This change likely won't have much of an effect on the Wizards, though. Kansas City has rarely ever used their full allotment of SI and YI spots. Usually the Wizards have had anywhere from 3 to 5 of their international slots used at one time. This year, the Wizards only had 3 of their slots used, for Scott Sealy, Carlos Marinelli, and Eloy Colombano. So chances are extremely unlikely that the Wizards will fill those other 5 slots for next season.
I could, though, see the Wizards adding another one or possibly two foreign players to their roster next year. Especially with the news later on in that same Goff article about Coach Onalfo attending a scouting combine in Argentina.