Too much radiation I would assume.
No. Atomic Betty ended in 2008.
Nobody knows for sure, it's up to the studio to decide
In the atomic cartoons website, they said that they're making a sequel to Atomic Betty called Atomic Betty Redux(which is the equivalent of season 4 of Atomic Betty and takes place after the episode The Future Is Now). However, they're going to release it in either 2011 or 2012
Sometime after December
The Best of Betty - 2011 was released on: USA: June 2011
The cast of Betty and Dorothy - 2011 includes: Betty Fawbert as herself Dorothy Kibbat as herself
It's not going to return ever due to budget constraints, it will be left at that
Betty Blue Eyes was created in 2011.
Betty Thatcher died on 2011-08-15.
Betty Taylor - actress - died in 2011.
Betty Lowman Carey died in 2011.
Betty Neumar died on 2011-06-13.