Not too surprising since it is a bit off-topic and probably not something they are pursuing. That said, I was thinking about it the other day and it is kind of shocking they haven't done more with the IP. Like in their push for mobile games, Arcanists seemed like a perfect fit.
The honest answer is that a RuneScape team or an Old School team aren't going to be announcing other Jagex projects. That news will always come from official Jagex sources (Jagex.com for example). We work exclusively on our games and share news exclusively about our games. That's why you'd get ignored.