The expression "Jake soon" has the opposite meaning of the word "soon". If someone uses the expression "Jake soon", they want to say that things won't happen anytime soon, or at least not within a time most people would consider as "soon".
"Jake Soon" is mostly known in the Jake Silbermann fandom because the actor likes to tease his fans with having exciting news "soon". Usually he reveals these exciting news within a time his fans don't consider exactly "soon".
Friend#1: "I will send you the email soon!"
Friend#2: "I hope not Jake soon though."