Fire Emblem Cipher TCG won't make it to the West. Even if it did, it will become rare for any store to even carry booster boxes like FF Opus. lol stores like Walmart, Toys R Us and etc. don't carry FF Opus, it won't become popular.
If you are collecting for the sakes of collecting, just collect it from Japan. I am already 8/9 complete series, have all the PR's so far and marker cipher cards. It's extremely expensive as a completionist. Jobless right now, so I can't get series 9 and series 10 is around the corner in September. Yikes.
Furthermore, If it's already been 9 series into the TCG it's pretty much too late for it to come out to the West. Even if it did, it would only last the first 1-4 series before it dies down and becomes overshadowed by another TCG or Pokemon lol.