GOD. You guys and your so called 'FACTS'. You know NOTHING. You're all IDIOTS BAH.
Generation X7.
...Seriously, no. For the most part, HJU posters are more or less raitonal and reasonable people. Getting worked up because you're sad something isn't going to happen and is kinda unbecoming of someone in this kind of environment. Dukemon does alot for the community, which is why we trust him. Media in Japan is a bit different to other media types around the world (yikes, THAT'S an essay) and this is why people *will* listen to him.
(Also Power Rangers Wikia as well as Wikipedia aren't exactly the best places for info. Summaries after a while as well as character rundowns, sure. But the best up to date stuff comes from where? Oh yeah. HJU.)
Official episode summaries are episode summaries. Writers can twist and turn their characters to do whatever they want. Defeating an enemy does not mean they need to grab a new character, especially at the end of the series.
Merchandise driven shows like Shinkenger don't simply rely on their televised programs for cash. Because Toei is a company, they want to make money. And most of that revenue comes from the merchandising products. Roleplay toys, gashapon, figurines, what have you. There is almost *always* (and I say almost becuase I haven't been around long enough to have known what they would've done in Himitsu Sentai Goranger) a promo for a character, in order to build up excitement for that character's appearance, so lo and behold, merchandise and stuff for that character sells. It's nothing personal, just business.
If this ruins the magic of the show for you, I'm sorry. It's just the way things go. It's a merchandise driven children's show (Seriously, prime example, Mogyu Bazooka. Doesn't need to be there. Is simply there so kiddies in SaikoNippon can be happy to have something to combine their Shinkenmaru with, and the company is happy because parents and collectors will fork out cash for it) which appeals to all ages, but ultimately, will be driven by dinero. S'why Hibiki went downhill.