Don't give a damn mention to your project publicly until you have progress to show. Most if not all of my successful projects, I started on my own or with some friends, and didn't ask for help before there was any progress.
You want people to say 'Woh, that looks really cool. I want to be a part of this and help'.
Otherwise, people will be doubtful and not want to participate in a maybe halfway effort project possibly?
Aka, start the project by yourself, then ask for people to help, whilst still maintaining progress by yourself.
Also, everybody knew you could not do blockland 2. Another tip would be to not start or ask for help on projects that you blatantly cannot and will not finish.