1.] A elevator block(/elevator -Maybe a block that can move up and down or left and right
2.] Simple takemoney cmd /takemoney- will take a certain amount a money from the player tht used the cmd
3.]Insta-Pillar /Instapillar (block type)- would create a 15 tall (or any height) of a certain block. It would also cost money. This cmd would be useful in zombie for quick get aways(example: /instapillar water ). or in lava survival for quick building
4.] /ball (could like move when touched, basicly like a soccerball or something)
5.] /trial (lava or water) Would make a trial of water or lava . To maybe slow down zombies behide you. You could even add a cost or a timer on it.
6.] Some spleef cmds. /spleef (time amount or loop) would refresh the map so players have a new spleef map to spleef on.
7.] /shapes (shape)- you could place certain 2d shape on the ground like a pentagon, polygon, star, ect.
I know some of these cmds might not be possible, just future suggestions also.