Where did you get that every 3 months there would be a new game?
Once they said "a new environment for each game in a year", so for TM, SM and QM, makes one env every 4 months, but not really totally new games
oops, sorry for the light translation errors
You can click on the link behind Hylis' name in my quotation above for the original thread and topic.
Basically this means we don't exactly know when Storm will be ready, and in consequence, when Valley will be released. Perhaps it will be a Christmas or New Year's gift, who knows.
All we know is that Nadeo started first with Valley, and they stopped to work on it in favor of Canyon and later Storm.
Since there were some very nice screenshots and movies about Valley already long ago, we can expect it pretty much ready, probably much less work left than we might think, but it is secret of Nadeo
Let's wait and see.