If I recall correctly, Abaranger, Boukenger and Gokaiger share the same types of joints, and Kyoryuger, ToQger and Ninninger share joints if you can get them to work.

Ninninger, however, has an advantage of using the same size clip for pretty much everything.

All of the Goseiger stuff was Zord Builder. Baltmatrix even did a video of him making one huge cluster of a mecha out of all the various headders and mechs.

I know Dekaranger and Gaoranger have those joints as well. Hurricaneger might.

Currently, Los Angeles is one of the 5 bids for the 2024 Olympics. if LA gets chosen for 2024, then the 2020 sentai should be Olympic themed because Saban can wait 4 years and adapt it just in time for the Anerican Olympics.

Why they don't make a different homage ?

That would imply that A)Toei gives a damn about what theme Saban wants, B)LA will win the Olympics and C)We won't be more than 4 years behind in 2024

A sentai could be based off a PR season ?

Kind of?
If a Sentai uses an idea that PR came up with originally, I doubt people would make the connection since PR tends to have rather basic sci-fi/fantasy premises.

Go-Busters and RPM, perhaps?

Randomly: I made a Moune Mii. I might make the rest of the Goseigers tonight or tomorrow.