I'm on the fence. This is both good and bad.
On one hand, I liked Umbrella Chronicles, despite the slow pace, the slug shooting, and recycled storyline. It was a pretty fun game and I still plan on buying it eventually. On the other hand, did it need a sequel more than RE4:WE needed a follow-up (on the Wii)? No, it didn't especially since one of the levels in Darkside Chronicles will likely take place during RE4 and that game is already available on the Wii in 2 flavors. The final level will probably involve Jill's fake death which if you play RE5 before Darkside Chronicles, it'll be spoiled for you. I still assert that not only is Jill alive, but Capcom has already showed her in the trailer (my bet is on the cloaked chick wearing the bird/thief lord mask being Jill). Plot-wise, like UC, this game will be utterly useless. Gameplay wise, DC might play better than Overkill but Overkill has unquestionably beaten any other on-rails shooter that has ever and will ever be released on the Wii in terms of presentation. "It's a good thing we found these mini-guns."
I bought RE4 on the Wii 2 years ago and I, personally, found it to be the definitive version of the game (despite the lazy cut-scene transition). Motion controls actually made an already near perfect game into an even better game. That's what I want. This goes beyond console loyalty because I have all 3 consoles. While playing through RE5, I will be thinking about how much better this game would play on the Wii. Bottomline, that's the most disappointing thing about the current state of the Resident Evil series today. Capcom could make a better RE game on the Wii, but they refuse to. As a gamer, I'm insulted. I don't mind Darkside Chronicles because I like RE and on-rails shooters, but give me the game I want.