Pretty sure CPE not being featured at Evo wasn't because of a late US release and had everything to do with the base's negative reaction to the balance changes in that version based on the arcade release.That's the biggest problem with the massive story mode. It delays the western release by far too long, and it's cost us any number of Evo slots. CP Extend wasn't out in time for Evo, so it got put out, despite having the most hype final last year(if not ever).
EDIT: http://shoryuken.com/2015/01/23/joey-mr-wizard-cuellar-discusses-evo-2015s-lineup/
For whenever their site is no longer down for maintenance.