It wouldn't surprise me, to be honest. :/ When I first asked them if the Japanese version had English language support, they were very quick with replying "yes". It wasn't until two days later that the Japanese twitter replied to my tweet and told me that it actually would be Japanese only.
I'm a bit annoyed to be honest. This has always been the main title I want from LRG, and there's a good chance I'll miss out on it. I doubt they'd do a 24 hour preorder period for it, and since it's a Vita exclusive they probably won't print a ton of copies either. I really hope I can get ahold of it so I don't have to pay some ridiculous price to a scalper...