Considering TAV a very new the KH series at this point, having the game end after KH3 would just feel like it lacked for me. Prior to BbS I had no clue who TAV were, now KH3 is focusing on them and thats it? The end of the KH series as we know it? I think it would be better to continue the saga so that we can see more development of TAV (who need it) and their interactions with SRK and the remaining Disney worlds. Not to mention I wouldn't mind seeing Kair's character develop, and if Nomura is planning on making her a keyblade wielder, another saga is neccessary I think.