Perhaps I meant North American :P (I didn't)

As long as the context made sense, it'd probably be a pretty enjoyable cameo

Nice one

I want Green and Black to be brought back as 6th Sentai Rangers in the future

Like with Timeranger where they had two Red Sentai Rangers, can a Super Sentai team have two Sentai Rangers sharing a color such as Green (My Personal Recommendation), Blue or even Yellow?

If there were two Green Sentai Rangers in one team, I'd say 1 Male and 1 Female for two Green Sentai Rangers

Hurricaneger has two blues, so yes.

As well as two reds.

But they don't call them blue and red. They're called navy and crimson.

In Ninja Storm sure, but in Hurricaneger they're Kuwaga and Kabuto.
The original question referred to Timeranger having two reds, the second of which wasn't specifically called red either.

Hell in Kyoryuger/DC we got 2 Blues, one's just given a specific shade to be called by.