This is the second season (the first was Choujuu Sentai Liveman) in which the rangers don't directly kill off ANY of the major villains, and one of the few with none of the major villains growing giant sized.
ToQger Returns marks Fumie Arakawa's director debut and her as the first female to direct a Super Sentai work.
Dawson Casting: The show establishes that the ToQgers are approximately the same age, having been in the same class and all; which makes it kind of funny that Jin Hiramaki (Tokatti) is 27, which would make him 11 years older than the youngest cast member Moritaka Ai (Kagura).
Minor example would be Riria (Mio), who is turning 21, while the rest of the team (sans the above mentioned) are in their late teens.
The age difference between Tokatti's and Kagura's actors was given a major lampshade by Wagon in #2.
Turns out the kids are Dawson Cast too. The Returns V Cinema released in 2015 was set in 2017, and the 10 year old child actors played their real ages in that. In the series, they were one year younger but playing three years younger, as the series aired in 2014.
Rainbow Bright/Brite for Akira due to his new name loosely translating to that of the 80's cartoon character.
The series in general is usually referred to as "Power Traingers". The term is often used by fans hoping to see a Power Rangers adaptation of the show.
I Knew It!: Many fans predicted that the Rangers were still kids taking the form of adults.
Name's the Same: Get used to calling the red and blue ToQgers Ichigo and Nigonote No. 1 and No. 2. When said Riders as well as Kamen Rider V3 meet the ToQgers in the Gaim crossover special, Mio even brings up the fact that V3 isn't called "Sango" note No. 3 like she is. As it turns out, Sango would come later.