(Boss1) Saiki Boss = One of the coolest bosses EVER!!!!!!! The background is one of the most epic too!!!!!!!!!!!!!! They better make him playable in home version, even if they have to add a anti-boss filter as default for online rooms for those who won't wanna fight them.
Saiki transformed > Orochi > Goenitz > Igniz > Krizalid > Rugal > Magaki > Zero
in coolness and pure epicness in presentation and style.
(Boss2) Dark Ash is pretty epic too, especially with the background like that.
Also if you notice in the portrait Victory screen, Ash still has light skin, but his clothes are black, and during battle, his aura is so black that it makes it seem like he's entirely colored black.
They really did a great job even though its a shame almost all of the Those from the Past members were put to waste. (But I still think they will be playable in Home version.)
But I wonder who is the Mid-Boss everyone was talking about?