We could have another mechas like the gingaman ?

I don't see why not.

Would you like a Jumanji-type Sentai?

How about this.

The villains are from a board game or a book or any object are free and terrorized the city.

I mean Toei love to have someone accidentally or purpose releasing the villains

List of Sentai Show feature Villains being free

Turboranger

Zyuranger

Kakuranger

Gingaman

Boukenger

Ninninger

Why they haven't do a jumanji type villain being free? This is a golden opportunity for them

Do you know what would be a real golden opportunity? Coming up with something vaguely original and not just ripping off some movie like you keep suggesting.

I mean, animals from space like the seijuu.

You know Kamen Rider Ryuki got a same plot as Highlander "There can be only one"?

Ryuki's plot is different from Highlander. Similar conpect (There can be only one), but the story and setting is way different.

When you over simplify things, everything can be seen as a derivative of something else. Highlander's plot was about McCloud ultimately winning the prize.

In terms of incredibly basic premise, you could say Ryuki and Highlander are similar. In terms of plot, they share nothing in common.

Also, I kind of want to point out that you constantly call Toei lazy for using similar plots for their shows and movies, and then every time you recommend a story for a KR or Sentai, you always basically say "Take X movie and turn it into a Rider/Sentai," which would be the epitome of laziness.

With the original Kamen Rider, I seen people have point of similarities of Cyborg 009 (they are from the same creator which is not surprising) and 8 Man. There is a difference between being a copy of something and having similarities of something else.