Looks like this will be failing.
I don't think so. These types of kickstarters can be succesful, but they have to be well run. Using your Bloodstained example, they had a huge lead up to the kickstarter, a lot of information on the campaign page, info about the engine they would use, and the development team Iga was partnering with. IGA also had a lot more goodwill than Romero does. If you want crowdfund and don't have actual stuff to show, then you better do a lot of hustling with you campaign before it launches, and during the campaign itself.
There was also a huge pent-up demand for another "real" Castlevania from the original creator. He made 50 of the fucking things, they're a known quantity, and people really wanted another one.
Are people really starving for another throwback shooter? Maybe. Do they feel like only John Romero can give it to them? No.
I also think attempting both singleplayer and multi is a scoping mistake. Just too much to take on for your studio's first project, and for your first modern FPS.
Keep in mind that Romero hasn't shipped a shooter since 2000, and hasn't shipped a game of any kind since 2005. The marketplace is different, consumer expectations are different, tools and teams are different. The games he was famous for came out a long time ago. He needs to make sure his new studio's first game is fun and polished. That means limiting the scope, limiting risk, and focusing on quality.
A title that delivers an awesome singleplayer or multiplayer experience will probably earn him funding for another game. A title that is mediocre at both probably won't.