Both of those were Pixar-produced films.
As were the "Toy Story" movies which are the only recent ones that come to mind with a "total absence of fathers". Granted, I haven't seen "Brother Bear" or even the "County Bears" movie.
Pirates of the Caribean is another example of a father and a deceased mother.
The only fairly recent non-Pixar Disney movie I can think of that has a positive father figure is ‘The Emperor’s New Groove.’
Since the release of Snow White and the Seven Dwarfs by Disney in 1937, animated films have become one of the most universally enjoyed forms of entertainment. Disney has a long history of developing, producing, and distributing films such as Beauty and the Beast, Aladdin and The Lion King. The stories and characters of these popular animated feature films have become part of our modern mythology, enjoyed generation after generation. Traditionally, these popular animated feature films have been created using the time-consuming and labor-intensive process of two-dimensional, hand-drawn cel animation.
In May 1991, Pixar entered into the Feature Film Agreement with Walt Disney Pictures for the development and production of up to three computer animated feature films to be marketed and distributed by Disney. It was pursuant to the Feature Film Agreement that Toy Story was developed, produced, and distributed. In February 1997, Pixar entered into the Co-Production Agreement (which superseded the Feature Film Agreement) with Disney pursuant to which Pixar, on an exclusive basis, agreed to produce five original computer-animated feature-length theatrical motion pictures for distribution by Disney. The five original Pictures under the Co-Production Agreement were A Bug's Life, Monsters, Inc., Finding Nemo, The Incredibles, and Cars. Toy Story 2, the theatrical sequel to Toy Story, was released in November 1999, and is also governed by the Co-Production Agreement. We are currently in various stages of production on our next feature, Ratatouille, which was subsequently added to the terms of the Co-Production Agreement, subject to certain exceptions, in January 2006.
On January 24, 2006, Pixar entered into an agreement with The Walt Disney Company to merge the two companies. The deal was approved by shareholders of both companies and the merger became effective on May 5, 2006. Pixar is now a wholly-owned subsidiary of The Walt Disney Company.