SoulCalibur VI will have a reasonably robust suite of single player and multiplayer game modes according to this latest Japanese trailer. Alongside the two story-based modes that were already confirmed, you're getting Arcade (which features a series of eight opponents), Versus (which you can play with a friend or with the computer), Training, Ranked Match (online), and Casual Match (online). A character creation mode is also featured, as is a museum mode, where you can look up concept art and play music.
http://www.pushsquare.com/news/2018/09/soulcalibur_vi_game_modes_confirmed_in_new_trailer