Will Bloodstained meet its March 2017 release window?

I don't think anyone here has doubted the sincerity and experience of the folks on board. I think most of us are collectively on the side of the game missing its estimated release, though.

Too long of a dev time is pretty unreasonable though. I'll give this game the same time it took to make Symphony, about 4 years. Sure they had assets from the axed castlevania title they were working on but since they aren't making pixel art this time around that should compensate. 

Other : Igarashi-san said himself in AskIGA#7 that the team is a little bit late but there is still so much time between today and the release date that I think it is too early for that question.
Still, I think it will be release like one or two months later because it oftenly goes like that. Regardless, I'd rather to see the game being released later and better than sooner in worse quality.

That's the whole point of the publisher: take on the financial risk of game development, so developers can make better games, while the publisher makes more from each copy sold. Honestly, I could see Deep Silver being fairly generous with funding the project, as a lot of the financial risk has already been removed from them.

We currently don’t have any specific information available regarding the game’s release date, as it’s currently way too early to accurately predict. I’m not on the development team or anything, but I do have some experience that might help put things in perspective. Here’s three important things to keep in mind:

1) Kickstarter requires you to pick an estimated fulfillment date (Month & Year) for each reward tier, so we had to make our best guess based on the current scope of the project. Once a tier is live (and at least one person backs at it), the information you wrote is totally immutable (you can’t change anything). This is why the $150 tier still lists including a Softcover art book instead of a Hardcover art book, even though the Hardcover stretch goal was reached within the first couple of hours after the campaign launched.

2) The Kickstarter ended up being SUPER successful (which is awesome), however hitting every stretch goal also significantly increased the project’s scope. More funding is great, because it’s the lifeblood of any project on this scale, but adding more things can also add more development time (more money doesn’t necessarily translate into faster development; like if you paid a painter 25% more, they won’t necessarily paint 25% faster).

3) Estimating an accurate delivery date for a creative project (especially with a new IP) is extremely difficult. Whether you’re a professional or an amateur, guessing the date for when your creative magnum opus project will be completed is nearly impossible until it’s very close to completion. It’s also pretty dangerous to announce your best guess too soon (as it’ll likely be inaccurate) because the public may conflate the inaccuracy as lying or failure if it doesn’t match what you had originally said.

Delays occurs in almost every game, and the "not delayed ones" can be a bad ones. I think Iga and crew will choose spend more time to make a better game. Plus we got a lot of Stretch Goals, all then probably not completely counted to the "release time".

But I think the prequel one will be lauch before, to make us be prepared to the launch (and to forget any delay )

I'm guessing late 2017.

And let's not forget about the publisher, they certainly are providing funds too.

Create me if I'm wrong but Inti Creates is going to self publish the game, just like they did with Gunvolt.