I think there will be gaas games of differing scope. Something like Twisted Metal is surely planned as a MP gaas game but it will obviously not need the same resources and playerbase as Destiny to work out.
But like you said, some of them will collapse. Succes is not guaranteed with these type of games. They will probably be happy when 2-3 out of these 10 hit big.
I don't think it's good for the image of any publisher, or platform holder, having games that not succeed and with bad reviews. GaaS games when fail normally do it with a bang. Square Enix had a taste of that with Avengers, Babylon Falls