I'm pretty sure all the games you listed will see the light of day. CoH is a already in a polished alpha state, saints row sells a ton, and South Park is a big IP. Metro is the dark horse but it has a pretty big following so I would not be worried about that one ether.So now we need to know what's going to happen to:
South Park the Stick of Truth
Company of Heroes 2
Saint's Row: Fourth
Metro: Last Light
Relic
Violition
I think 4A aren't owned by THQ, am I right? If so, I guess they just need to find another publisher for Metro, just like Obsidian with South Park.
So the real worries are just CoH2/Relic and Saint's Row/Violition