NOT SOON ENOUGH.
Blizz and Kespa have a 2-3 yr deal, and BW is utterly WAY more popular than SC2 is in Korea.
There are more than usual FOREIGN tournaments getting posted on TL and iccup nowadays. I certainly don't see this as dying.
Yes it is an old game and it will die sooner or later, but you see that BW is more fun than ever, with Bisu/JD/Flash triangle leading the way, showcasing ever more amazing skill and talent that SC2 can never harness.
I believe SC2 was more of a threat to BW in beginning stages. BW scene has actually calmed down more now and is more stable with strong fanbase and support. so OP, your opinion is too early of a calling.