I got both the codes for Butoden and the day one Goku & Vegeta Blue unlocks printed on my receipt. No slips in the case like with the initial PS4/XB1 release.I have zero interest in Super Butoden, so if you don't get a code, you're welcome to it.
I vaguely remember that the supposed preorder bonuses for the game on XB1 and PS4 actually came in the "Day One Edition" physical copies of the game. I'm curious if it'll be the same for Butoden.