No. There is no practical reason for either company to cooperate on a project.

Your "suggestion" is like asking "Maybe put the Avengers in the next Star Trek movie?" in that it's a ludicrous and impractical premise for a cooperative project that serves no benefit to either group involved.

What's kind of mechas a olympic-themed could have ?

Do you considered Kyuranger Toei's most risking move for Super Sentai because the concept is 9 Ranger Show

It's NOT going to be 3 Ranger Show, It's NOT going to be 5 Ranger Show. It's going to be 9 Ranger Show!

This is got to be the highest number for Main Core Team. That's a new world record!

You mean Gingaman? Every one of the leads looks like they stepped out of FFX. :lol

What's the general opinion of Kyuuranger so far

I enjoyed the series.

But...It isn't even out yet

Naw Zyuranger. Gingaman was straight outta Monster Hunter. :lolol

Must be Future Trunks. :lolol

Most people seem to be pretty excited about the obvious visual changes and the new team dynamic of nine members to start. Personally, being Sentai, I'm on a "wait and see" program.

I rarely get hyped up for Sentai. I try to remain cautiously optimistic, but even that's hard for me.
The irony being that I tend to gravitate more towards Sentai than Riders these days, anyway.