Yes it is a trope, but Cavill is genuinely a fan of the games and video games and MMOs in general. The stories about him completely ignoring the original call for the Superman role because he was playing WOW are pretty old at this point.A
I was going to say they shoulda slapped some fake 5 o'clock shadow or beard on him or something - he just doesn't look right; although I guess they sort of get a pass since it's a "younger" Geralt.
Still not a fan of the trailer but I'll still give it a go.
And apparently all actors are fans of the games/books/comics they act in/portary nowadays cause we all know they were all nerds/geeks growing up. /sarcasm