I guess Trev's source may be on the money. For reference, here's what Trev said. I have a reason for bolding the 4 games that I did, something that I'll mention after the quote.
To be honest, this isn't really that gigantic of a line-up as far as Nintendo output. And if Caviar F is for Rhythm Heaven Plus (another leaker confirmed that Cadillac is for Style Savvy), that would count as a late localization. But at least in the case of Rhythm Heaven