Not sure how I should feel about this. One part of me says "Nooo! I'm sick of "INUYASHA! KAGOMEEEE! SIT BOY!" etc over and over for what seemed like an eternity and then a massive cop-out ending, but if this indeed finishes the manga.. then I guess it'll be okay. I was satisfied by how the manga ended to be honest, so if it's adapted properly, I can imagine it will be a lot more fun to see and hear than to just read. The ending to me, after all, was pretty sweet in the romantic sweet sort of way.
Then again, if they go the route of adding random filler that makes no sense at all, then wake me up when important plot points start. D: