November 7 is a big day for Mass Effect fans, otherwise known as N7 Day. It's derived from the N7 designation reserved for the Alliance personnel (humans, basically) with the highest proficiency level such as the series' fan-favorite protagonist, Commander Shepherd. The series' developers, BioWare, have embraced this date over the years, including this year.
As part of this year's N7 day, BioWare dropped a clue-filled teaser for the next Mass Effect game and fans are busy digging up potential clues about what it could mean for the game.
BioWare even encourages fans to spend more time examining the short clip "more closely".
Without going down into the rabbit hole, the prevalent theory is the in-development Mass Effect game will pick up following the events of Mass Effect 3. Unfortunately, it won't be a sequel in that it will likely take place hundreds of years later. Keep in mind that the canon ending of Mass Effect 3 sees Shepherd destroy the entire mass relay network to prevent the current "cycle" of society from being engulfed by the reapers. The ending of Mass Effect 3 confirms this, as Shepherd's act of bravery has been turned into a story told to a new generation of what appears to be human beings.
