I don't care much about the online challenge mode unless it is a full-fledged Harmony of Despair style game mode, as the prior online challenge modes were not all that interesting, and the extra playable characters, aside from the amazing Julius mode in DoS, quickly grew old due to their static nature and limited abilities, so a third character is nice, but not a huge deal, but I would love the prequel mini-game. I really enjoyed Mighty Gunvolt, even if it was ridiculously short and rather easy. I would hope it's a bit longer and deeper than that, as a stretch goal and not a freebie for two games, but I would love for it to be retro like Mighty Gunvolt as well.