Drafting off of the latest super-sad Avengers: Endgame trailer is a Game of Thrones teaser that wants you to remember this is a show that does not often (ever?) have happy endings. After two mildly upbeat teasers, the footage from HBO's "Aftermath" trailer is a reminder that all men must die. You know, in case you forgot for even one second with this show. And we can predict pretty readily I think that there will be many more deaths to come. In the new tease, Winterfell has fallen, lying in ruins in the snow. Throughout we see tokens …