My guess is - yes.
This summer Javier Plascencia (Finca Altozano, Mision 19 .......) posted on Instagram that he was taping a TV show, but he couldn't divulge which one. I was later told that the TV program in question was Anthony Bourdain's cooking competition show, The Taste.
So, given the fact that the next episode is titled Latin and the contestants will be preparing ceviches and tacos, I think it is safe to assume JP will be making his US network debut next week.
The Taste's Latin episode airs on Thursday, January 8 on ABC.
Update: JP confirmed via Twitter that yes indeed he will be the guest chef on Thursday's The Taste.