haven't been a member of the board long enough...when do we usually start hearing about next year's Super Sentai show and theme?

The rumours usually kick off around November, and we usually have confirmation around January, if I'm remembering correctly.
Edit: After looking it up, December looks more like the time when we start getting pics and reveals, with the full details coming in January.

Catalog pictures usually come out on the first Thursday of December while we get the first flyer featuring the cast in costume on New Years eve. Last year was a little different in that we got the Ninninger stuff on Christmas.

The copyrights vary, but these are the last few dates:

Zyuoh - 09/29
Ninnin - 10/23
ToQger - 9/26
Kyoryu - 9/06
Go-Bust - 9/29

What is your criticism toward Zyuohger?

My criticism for Zyuohger that their villains are weaker point for Zyuohger.

I'm like of how this Red Ranger is NOT ANNOYING OR SCREAM FOR NO REASON but I felt their villain are like MCU Villains-type.

Zyuohger have Marvel Villains Problems-type! That's just my opinion about their villains

Looking at these dates it sure gives a good rough outline of when pre-pro begins for the creators.

Cool. So, late September we get a name. And then full reveals begin in December. Good to know. Thanks guys.

My complaints are basically the same as yours (at least they have cool designs :p). Zyuohger is good for the most part (still, those animal people during the ending dance are so cheap looking and the suits and mechas are still bad...)

So, unless I decide to pull the trigger on the Dairanger DVDs, my next Sentai season will either be Abaranger or Gingaman. Which do you suggest?

Is zyuohger that good to watch?

I think so. Pretty entertaining~