EDIT (The crux of my feelings finally came to me at the end in bold).
I understand in the sense of "market-history" that Castlevania wants to blend all of these other modern games. At the end of the day, I don't think that strategy is going to make the Castlevania name huge. To connect with & answer a comment earlier, I don't hate Devil May Cry--in fact, I played through 1-3 and loved #3. But at the end of the day, DMC is about anime-style action and encountering enemies that you have to combo to death. It's fun, but if done on too many games, it becomes boring. And the list of these games has exploded in the last few years. LoS will be different, but will it be different enough? I think Shelverton is right on when he says that action games are becoming more akin to Beat-'em-ups. That's not to say they can't be fun, but as it goes on, using the analogy, you can't tell much difference between the basics of Final Fight and Streets of Rage.
I don't have all the solutions, but I want to see 3D action-adventure break out of that rut, and I expect the Castlevania franchise to be a distinct industry leader. LoS is going to have its share of puzzles and the like. It might all turn out fine, it might be a mixed bag--who knows. I do not think it will be horrible by any means, but I'm itching for a Castlevania that sticks it to the industry and says: "I'M CASTLEVANIA in 3D--move over chumps!" Not, "I'm 3D Castlevania, and you can't refuse me this time because I have enough elements from other games that are popular in this current generation & have star power with Kojima and Sir Stewart." I mean, theoretically, if you could make Mario more popular by giving him guns like the modern Ratchet and Clank, it wouldn't necessarily make a superior Mario game.
My bottom line: The LoS trailer looks solid. It doesn't make me jump up and down, but it looks like it will be a good game. Problem is I'm past looking for a "good game" from Castlevania. I'm looking for something that blows one's mind in the way that Castlevania IV did back in the day. That's my problem. I mean no offense. The next trailer may blow me away. But right now there hasn't been enough evidence. The crazy thing is, despite all the subtle hints/homages, I haven't connected this game to "Castlevania" in my head. At the same time, though, if it wasn't Castlevania, I'd feel it was ripping Castlevania pretty badly. Needless to say, I do not know what to make of this game yet, and the media for it so far hasn't been helping me. So really, with all this talk, I'm just trying to figure out how I could be more convinced that this game is definitely Castlevania in 3D and is a distinct, leading game in the industry.
Random: Yeah, Shinobi for PS2 was enjoyable for its time (good music, too). I think level checkpoints would have helped the frustration level of its camera issues (the idea of death pits is cool with me, though). Never did get to play the PS2 sequel, Kunoichi. Also, you know what were good 3D action-platformers?--PS2's Maximo and Maximo 2 (they were the 3D "reimagining" of Capcom's amazing Ghosts N Goblins franchise). There were combos there too, but not as prolific, and that had some of the best designed platforming with a 3D camera for an action game.