Wether Simmons is good as villain or not is to a great extent personal taste, but the data base to judge about this should be a bit bigger than that trailer. I don't see a need for celebrities in video games but for me his performance as Ketheric is ok so far.
Simmon's has enough of a profile to be recognised by wider audience (both for his film work in blockbuster films, like Spiderman/Batmans and more artsy productions), and bring starname to the project, I don't think he is your average "celebrity". While he got recognition and performed some lead roles he is mostly a known for his
character work, which should make him an excellent fit for crafting a computer game character that has brief apperance, but leaves an impact. He is also not a stranger to doing VO for animation and games.
