Mr. Adventure wrote:
This character has only existed for three years to less than stellar sales, I'm not sure why he would be expected to be part of the Spider-Man films at this point.
That's not entirely accurate. Before Marvel "killed" 616 Peter off and replaced him with the "Superior Spider-Man". Ultimate Spider-Man was outselling his mainstream counterpart. Superior Spider and Amazing Spider (now that Peter is alive again) sales are were/are stronger than Ultimates now, but in 2012 Miles was the main man.
I was glancing at the 2012 sales calculated on this site
and I'm seeing various 616 Spider-Man titles in the top 25 and the Ultimate title in the 30-40 range.