I'm kind of surprised Disney does there own CGI movie while they still release Pixar's. Wouldn't that mean their competing with themselves?
As long as the movies aren't coming out at the same time, it's not really a competition. There's more than enough room for more than 1 or 2 successful animated movies per year, and all the money goes to Disney in both cases, anyway.
Also, it seems to have worked out pretty well so far. (this is Disney Animation's 6th CG feature, after all)