Before it can have any sales figures it has to be released, for it to be released someone has to be working on it, for someone to work on it, it has to exist. There is no evidence that supports the claim that SE is even thinking about a remake/port/re-release. The OP even said, most of the games that are gonna be on the 3DS are from PS2 era, which (to me) means they are skipping PSX/PS1. Hell, they released all of SE's PS1 and older Final Fantasy Titles again, some in PSNetwork, some on GBA, some on DS, and they're even re-releasing obscure crap like Chocobo racing (no offense to anyone who actually likes those games).
But not a single word about Chrono Cross. Just two ports of Trigger and an insult about not buying enough (Yuji Hori? I think that's his nameShinji Hashimoto - thanks gatotsu).
Do systems now have the capability to play CC? Of course. But, you know, as I know, SE doesn't care anymore.