Oh, yes please! I would squeal like a little girl getting a puppy!

(I hope Furabiijo is in it! :D)

Maybe Ninjaman is sent by the God Generals and is forced to make a Sentai

And he co-leads the team with Shurikenger and hilarity ensues.

I demand Shurikenger & Ninjaman for mentor's this year.

This means we'll probably get another Ninja War movie ala Kyoryuger VS Gobusters huh?

Maybe throw in Shinkenger for some classy time honored ninjas vs samurai action.

Well, I'm currently predicting that the next Taisen film will be Drive teaming up with the three Car themed Sentais (Turboranger, Carranger, and Go-Onger), so the three way Ninja Sentai battle will most likely be for the 2015 VS movie.

It seems I'm the only one not excited about the prospect of more ninjas.

To help try and make a point for myself heres me just spitballing better motifs:
-Branches of science
-Myths/legends
-Fairytales
-The Solar system (works as a Sailor Moon homage just like Jetman and Gatchaman)
-Ancient civilization/aliens (sort of like Ohranger)
-Knights
-The ocean
-Men in black-esc (sort of a prequel to Dekaranger)

That's just off the top of my head, surely ANY of these would be better than ANOTHER ninja sentai

I do hope there is a new ninja ranger team after Kakuranger & Hurricanger.

How about their motifs be yokai?

So, rather than ninjas, you'd want to see a second Magiranger, Ohranger, and Dekaranger?

Additionally, you're only going off the motif and the motif alone. It's like if the next Sentai was based around pirates and complaining "We had pirates in Gokaiger!" despite knowing nothing of the direction they're taking it in, theme, tone, or gimmick.