The old thread will get bumped back to the top with activity.
I don’t wanna be that guy heartlessly enforcing the rules (who am I kidding I love being that guy) but hijacking other Kickstarter threads for one other game which by all accounts has/had the opportunity to be seen on the forum already isn’t exactly the way to do things.
Agreed, but you can do that without pumping links in other threads.
Edit: In fact, this seems like a good time to invoke mod merging powers.