He also stated that he will help any Colombian, as they always help him, as long as it doesn't affect the team's goals. One of the best moments for me in the 2013 Giro was when Betancur flatted. Majka and team attacked at that point. Betancur stated later how ****ed he was that they attacked when he flatted.
When Betancur tried to come back, several members of team Colombia stayed behind (not Ag2r) and helped him latch on. Betancur eventually finished with Uran & Duarte ahead of Majka.
This year, there is 9 from Team Colombia, Uran, Quintana, I'm assuming Serpa & Anancona for Lampre (helping Horner?). Sarmiento will probably be there helping Basso. Who else? you mentioned 18. Arredondo? Acevedo?
Quintana is now the clear favorite. If Horner is confirmed, he is also another favorite next to Nairo. Porte will fight for the podium. Uran, Purito, Cadel will be fighting for top 5, IMO.