I doubt it's RS remakes. If it is, they'll be on the DS, and that'd be a bit ridiculous. The next main series games will likely be on the 3DS, and it would need to be 6th gen, since there'd be compatibility issues. And they won't start off 6th gen with RS remakes, it's better to start with completely new games that can experiment with new features present in 6th gen and then RS remakes can draw off those improvements and make some of their own. So it's highly likely we're getting completely new 6th gen games next.
Also, I hope when they say they're "evolving" the series that doesn't mean that 6th gen is another "reboot", that's getting really annoying. They've had too many "reboots" as is, and it's getting quite annoying. It's bad for the series' progress if we keep throwing out the improvements past gen games made at the beginning of the generation all the time. This kind of nonsense needs to stop.