Honestly the only real reason no one has heard from her was because of her illness. Even while she was sick she attempted to write songs and she worked in her home studio while recovering. As soon as she started getting better, she immediately returned to making music. She even performed live at the Special Olympics while still recovering. The other reasons just don’t even really make sense. Every artist experiences declining sales when they’ve been around as long as she has and the Hello Kitty thing, if anything, brought her more attention, even if negative. And the divorces have absolutely nothing to do with her career, again, if anything it gives her publicity.
I don’t think this video means anything is coming soon by the way.
The reason why Avril isn't doing as much these days because of the Lyme disease. Marriages and divorces are completely off topic and have nothing to do with her disappearance. Also decline in sales occur because the record wasn't successful, and it happens with every artist. Those kinds of videos aren't my thing, but that's my perspective on it.