Hmm. I looked it up and obviously there's not much info out there as it's still a closed alpha. I'm not so sure about it though.

I think it's kinda weird that they have Runescape 3, Old school Runescape, then recently Brighter Shores, and now this 4th game? Like damn.

brighter shores isn't a jagex game
it's a game made by the creators of runescape