I'm not sure how the Carranger rumor happen. I guess in the 90's, someone on the web probably post a rumor that Super Sentai is going to end after Carranger because things didn't look so hot back in 1995.

Sentai has been a strong franchise through toy sales, i don't think will end not anytime soon.

what do you think if in liveman mari and takuji didn't die when kemp&other leaving acamedia but instead just heavily injured and become green sai and black bison and joind the team at epsode 24 or 26?

do you think that gonna improve liveman?

Could the social and political situation of Japan at any given time have influenced the Sentai airing at that time? Ohranger is the one most will fall back-on due to the unfortunate occurrences of its day, but were other series influenced on a more subtle level, such as design and plot. Creators of a series always tend to "sprinkle" a little bit of themselves into a creation, and science fiction usually tends to serve as a metaphor for more realistic social and political debates of its era. Is Super Sentai an exception to the rule, or no less interconnected to the rule?

P.S.: Question could also, technically, apply to any Tokusatsu and not just Sentai.

P.P.S.: Just to be clear, this isn't meant to start a political debate, just to determine potential political/sociological inspirations of a franchise.

I heard green and black were added to sell more toys because the mecha combinations looks very unnatural. I guess having them alive would ease the dark tone of the show especially with another girl on the team.

We could have another organic mecha like the starbeasts from Gingaman ?

what series has the most balanced cast of characters? like most of the team gets equal development

Regarding equal development, as much as I can remember Dairanger, Megaranger, and Timeranger perhaps?
As for best choice regarding actor casting, I would say Carranger, Megaranger, Dekaranger, Shinkenger, Gokaiger, Kyoryuger, ToQger, and Zyuohger.

What's considered the worst Sentai season and why?

My vote is for Dekaranger and Megaranger.