Our BWV 1BR at the end of last month had the normal drip coffee pot that took flat bottom filters. However, reading posts above and in recent past months, it sounds like DVC coffee makers are in transition from the pots requiring flat bottom filters to the dual pots that use cone-shaped filters. I would bring both - in fact we do have both kinds in our Owners Locker because we stay in other timeshares that use one or the other.
FYI you will be provided filter packs of Joffrey's coffee, like a giant tea bag as
@kanerf aptly describes them! They'll be usable in whatever coffee pot is in your studio, and Housekeeping will provide extras if you ask for them. So if Joffrey's is acceptable to you, you don't need to bring coffee or filters. We prefer our own brand of coffee, so we bring that.