So I just found out that Land 3 has all the 4-komas from the previous games, along with its own set. Weird.
Since I already have the new set all unlocked. I figured I may as well share it. I MIGHT unlock the 4-komas from previous games via Land 3 if things like Kart DX's requirements cause me to go insane (seriously though, the unlock requirements are things like dying 20 times in Survival Bomberman mode).