There is absolutely nothing stopping you or anyone else making a film, animated or otherwise, of Alice in Wonderland. Disney categorically do not own copyright to the original work. There have been over 30 non-Disney adaptations of Alice in Wonderland since the 1951 Disney version, as well as 2 more works by Disney.
Since Lewis Carroll's original work had gone into the public domain, it is a misnomer to say that Disney "ripped it off". Anyone can take a public domain work and monetise it. That derivative work may be copyrighted, much like the performance of a Beethoven symphony (are the orchestra ripping off Beethoven?) or the performance of a Shakespeare play (again, are the actors, producers and directors ripping off Shakespeare?).
You seem to find the money side distasteful, which is a different argument. The issue here is that the Walt Disney Company, who ultimately own the copyright to the derivative work, maintain their copyright. Yes, copyright laws need re-examining in a world where corporations own copyright, but it's far more nuanced than you are making out.
Since Lewis Carroll's original work had gone into the public domain, it is a misnomer to say that Disney "ripped it off". Anyone can take a public domain work and monetise it. That derivative work may be copyrighted, much like the performance of a Beethoven symphony (are the orchestra ripping off Beethoven?) or the performance of a Shakespeare play (again, are the actors, producers and directors ripping off Shakespeare?).
You seem to find the money side distasteful, which is a different argument. The issue here is that the Walt Disney Company, who ultimately own the copyright to the derivative work, maintain their copyright. Yes, copyright laws need re-examining in a world where corporations own copyright, but it's far more nuanced than you are making out.