In 2018, LEGO released 3 Ninjago Promotional sets, all of these sets have been retired. For that year, the total price of all retail sets cost $8, today those sets are valued around $429, a growth of 5270%.
Most valuable 2018 LEGO Ninjago Promotional set
5005257 NINJAGO Minifigure Collection $413.07
Largest 2018 LEGO Ninjago Promotional set
40315 Ninjago Board Game 49 pieces
3 sets

40315 Ninjago Board Game

Theme / Subtheme Ninjago / Promotional
Year 2018
Pieces 49
Availability Retired
40315 LEGO Ninjago Board Game
promotional
Value $8.99
Annual growth 34.4%

5005231 Training Kit

Theme / Subtheme Ninjago / Promotional
Year 2018
Pieces 24
Availability Retired
5005231 LEGO Ninjago Training Kit
promotional
Value $7.02
Annual growth 5.7%

5005257 NINJAGO Minifigure Collection

Theme / Subtheme Ninjago / Promotional
Year 2018
Pieces / Minifigs 25 / 4
Availability Retired
5005257 LEGO NINJAGO Minifigure Collection
Retail $7.99
Value $413.07
Growth  +5069.8%
Annual growth 33.4%