Did they show anything at EVO before? When would they do it? During a panel or something?
I've been to the last three Evos but I only remember there being a panel in 2015 and 2016. They really didn't reveal anything major at the 2015 panel. (That's the one with the famous PowerPoint slide on buffing weak characters instead of nerfing strong characters.)
In the 2016 panel they talked about SFV data such as the top 5 purchased costumes (Ken's story costume was #1), most used characters online, etc. It was just a couple of Top 5 lists really. And then they showed the Alex and Ibuki costumes alongside the Bison stage and ended on the CPT DLC. There was a Q&A session at the end but it was mostly pointless questions. I think the same or similar Latin America CPT question was answered twice. I didn't get to ask my question unfortunately; I planned to suggest a whole bunch of stuff.
Anyway, I don't think they've used Evo to announce or reveal anything major during the SFV era. I even recall Evo 2014 ending with Ono asking for shoryuken photo and saying they had nothing to announce at that time. So I would set expectations to absolute ZERO.
Edit: If you check LI Joe's twitter (use the search to go back to that timeframe) you can see all the slides from the 2015 panel.