Yeah, I totally feel you with the "not getting your hopes up for a lot of info" mentality. That's literally the worst, expecting something big and then getting nothing at all.
But I don't think we're going to see such huge information droughts with these games; even if it's not from CoroCoro, I think we can expect some little things to keep us going while we wait for the release of the games. June is almost over, so we have slightly under five months before the big day. Unless they want to keep us completely in the dark about ORAS (which is simply a bad marketing tactic because a lot of fans would lose hype), they don't have a whole lot of time to show us more stuff. For example, if they revealed two Gym Leaders a month, it would still take them four out of the five remaining months to showcase them.
The other thing to consider is, what constitutes as "major" information? These are remakes, so with the exception of the new Mega Evolutions and maybe some new plot devices, we basically know everything about them. Even those who haven't played RSE can watch an in-depth Let's Play or read a Bulbapedia article and know what the games have to offer. So our last CoroCoro had "major" information because it revealed Primal Groudon and Kyogre, and Mega Swampert, Sceptile, and Diancie. At this point, even something like revealing Wally would be considered "minor" because it's technically nothing new. That gives us more opportunity for small updates, but at least they would be more frequent.
I vaguely (because it was so long ago) remember that the Japanese HGSS site would update without notice every so often to showcase a different Johto Gym Leader with their new art. That kind of subtle, "not really new but still new so it's exciting" kind of stuff is what I expect to see from here on out, with maybe one or two "big reveals" leading up to the releases. Granted, if they have more big reveals than that, I wouldn't complain!
