Basically a French Twitter account contacted Eric's old company and they said he no longer works there. They then publicly posted that he hasn't worked there since 2016 and they are not working on anything Smash related.
However Eric now works at a different company that does not list Bamco, Nintendo or Universal Studios (makers of the new Grinch movie) as clients, but have worked for Ubisoft to make cardboard for Assassin's Creed stuff. Not listing their clients may just be an NDA issue.
Turns out the blank Battlefield was shown on a
huge ****ing BILLBOARD at E3 this year, and no-one realized until about 12 hours ago. Anyway, there are differences between that one and the one in this leak, (such as the crystals being different and a castle missing) but someone has pointed out that this would not be the first time the background has changed since E3.
Both MysticDistance on Twitter and SpawnWave think the leak is real based on their sources, but say there is one more character remaining who is oddly not in this leak
. @papagenos also has a source at Microsoft who knew about these 7 on the Grinch leak, but never heard of this last character.