What was wrong with W's V-Cinemas? They're certainly better than all of Den-O's spinoffs at any rate in regards to story relevance.
I never really liked Terui, and I think Minehiro Minamoto is too weak to center a whole story on -- which is probably why they decided to center the movie on that weak-ass supporting character who I didn't give a crap about. Also, I'm one of the few who never minded Akiko's bizarre-ass comedy in the series, but you know one way to make her unbearable? Give Yamamoto dramatic material. (An Akiko worried about a cheating Terui is a pain to watch.) The story's boringly predictable, too. It might fly as a two-parter in, like, the 30s of the series, but not as a special V-Cinema targeted to older fans.
But you want to talk about not caring about characters? Write a movie around Eternal. I don't like him or his cronies, so an entire movie that tries to retcon in some sob story to justify making a whole movie about them...please. I had avoided these two movies for so long because I already knew the idea of Accel and Eternal having their own adventures would suck, but I was really in need of scratching a W itch, so I gave them a shot and regretted it.
But what makes these movies really unbearable is Sakamoto's direction, especially in the Eternal movie -- he can't keep the camera still for even a split second. Like, fine, use the shaky cam to cover up what a mess your action scenes are, but ordinary and quiet scenes don't need to be SHAKE, SHAKE, ZOOM IN, SHAKE, ZOOM-OUT, SHAKE, SHAKE -- Sakamoto's like Rob Zombie with the DTs using a camera attached to a yo-yo, and he's the reason why I'm not letting myself get excited about these Sharivan and Shaider movies. Why couldn't Shojiro Nakazawa direct these movies? Gokaiger VS Gavan has come closest to matching the feel of the old Space Sheriff shows, and that movie was holding back because Gokaiger was always so scared of focusing on old characters.