Posted by Jeremy on September 6, 2019 at 03:51 PM CST
Typically the lifespan of a LEGO set is around two years - or three-ish for Ultimate Collector Series sets - and collectors have had to rely on experienced guesswork and sites like Retiring Sets and the retiring soon page at LEGO.com.

This time around Rebelscum has been given a list of retirement dates, and while they haven't come from an official source we feel comfortable declaring them as accurate and truthful.
December 2019

75200 Ahch-To Island Training
75230 Porg
75259 Snowspeeder (20th Anniversary)
75208 Yoda's Hut
75222 Betrayal at Cloud City
75226 Inferno Squad Battle Pack
75225 Elite Praetorian Guard Battle Pack
75261 Clone Scout Walker (20th Anniversary)
75218 X-Wing Starfighter
75199 General Grievous Combat Speeder
75221 Imperial Landing Craft
75247 Rebel A-Wing Starfighter (4+)
75224 Sith Infiltrator Microfighter
75233 Droid Gunship
75229 Death Star Escape
75228 Escape Pod vs Dewback Microfighter
75262 Imperial Dropship (20th Anniversary)
75238 Endor Assault (Action Battle)
75223 Naboo Starfighter Microfighter

July 2020

75234 AT-AP Walker
75214 Anakin's Jedi Starfighter
75237 TIE Fighter Attack (4+)

December 2020

75235 X-Wing Starfighter Trench Run (4+)
75244 Tantive IV
75242 Black Ace TIE Interceptor
75240 Major Vonreg's TIE Fighter
75258 Anakin's Podracer (20th Anniversary)
75239 Hoth Generator Attack (Action Battle)
75159 Death Star
75220 Sandcrawler
75236 Duel on Starkiller Base
75243 Slave I (20th Anniversary)
75192 Millennium Falcon
75251 Darth Vader's Castle
75241 Echo Base Defense (Action Battle)

December 2021

75253 Droid Commander (Boost)
However you chose to use this information remember that helping the community by not scalping/hording sets is a good motive, and making the occasional purchase through the links to LEGO.com that we provide help us to maintain the site.