UPDATED 1/22: 

There will no doubt be trades, MLB and minor league free-agent signings, waiver claims, perhaps even a Rule 5 Draft pick, some non-tenders on 12/2, and maybe one or more Cubs minor leaguers will get taken in the Rule 5 Draft, but - AS THINGS STAND RIGHT NOW - here is the preliminary projected Cubs Spring Training roster:  

UPDATED 1/19: 

As things stand right now...

INTERNATIONAL SIGNING PERIOD 

The Cubs have released 15 minor leaguers: 

If the departure of Theo Epstein in mid November was not a clear sign of things to come, today's trade of Yu Darvish certainly heralds the arrival of a rebuilding phase for the Chicago Cubs. It has been widely reported that the Cubs and Padres agreed on a deal sending Darvish and Caratini to sunny San Diego, fomer Brewer Zach Davies to the Cubs rotation, and two pairs of young shortstops and outfielders to Cubs' minor league facilities for years to come.

12/10 UIPDATE: 

SELECTED BY CUBS IN MAJOR LEAGUE PHASE OF 2020 RULE 5 DRAFT:
Gray Fenter, RHP (selected by Cubs from Baltimore Orioles AAA Norfolk roster)

CUBS MINOR LEAGUERS SELECTED IN MAJOR LEAGUE PHASE OF 2020 RULE 5 DRAFT
NONE  

PLAYERS SELECTED BY CUBS IN AAA PHASE OF 2020 RULE 5 DRAFT : 
1. Nicholas Padilla, RHP (selected by Cubs for AAA Iowa from Tampa Bay Rays Hi-A Charlotte roster) 
2. Samuel Reyes, RHP (selected by Cubs for AAA Iowa from Pittsburgh Pirates Hi-A Bradenton roster) 

CUBS MINOR LEAGUERS SELECTED IN AAA PHASE OF 2020 RULE 5 DRAFT: 
1. Yunior Perez, RHP (selected by Detroit Tigers for AAA Toledo from Cubs AA Tennessee roster)
2. Jeffrey Passantino, RHP (selected by Pittsburgh Pirates for AAA Indianapolis from Cubs AA Tennessee roster)