If the ICO can not prove to people that they give a real project to them, I don't think that the ICO can come back smoothly to the crypto. It is because many people have got trauma with the last ICO that they invested, so they think that the era of the ICO ends, and they don't want to get the same mistake. We will see what will happen with the ICO, and we can hope that they will give their promises to the investor.
That is supposedly they will do And each developer will think that seriously otherwise, they will still fail again. The trauma for every investor had felt that time is really hard to completely gone, they will surely think about and sees no difference from the new one.
Now, the challenge could be that hard but if these developers will look for the benefits of everyone, not just for them, they actually get that back and investors will see a big difference. They should have to prove it and should have not to compromise their promises for their is a reason that these investors will show interest with ICO again.