Reports from Argentina suggest that the bout will now take place on January 16th in Macao, China. Technically it's neutral territory, though Nietes would likely feel more at home given the sheer travel and time zone change that Revecco would have to go through, but it's an interesting location for the bout and one that could see the profile of both fighters grown.
From what we understand the date and location are still not set in stone, but this is looking like the preferred options for both men in terms of date and time and is expected to be signed and sealed in the near future.
Macao once looked likely to be a major hub for Asian boxing, with Bob Arum using the special administrative region, though it has failed in recent times. After 4 cards in 2014 it hosted 3 in 2015 and 0 in 2016, before staging a low key "comeback" this year, a long way from being the location for fights featuring the likes of Manny Pacquiao, Zou Shiming and Ryota Murata.
At the moment there is no mention of any under-card bout, but it would seem likely to be sracked with local Chinese talent, and may feature one other bout of note.