These are amazing! Really well done! I like the Demon's Souls one the most.
It's funny, I'm doing a project right now at school and I'm using a bunch of different game logos to represent a bunch of different bezier effects, and I too chose the classic green/red Castlevania logo for one of them.
In terms of quality I bet Treyarch will make a pretty good Call of Duty game next this year. Will it be better than Ghosts? I dunno, I haven't played a Call of Duty game since the original Black Ops, but people seem to like the Treyarch games a lot.
And I don't think it's going to stop selling well. I can see 2014's Call of Duty selling better than Black Ops 2 (especially if it's Black Ops 3).