A group of motivated people making levels for the bash, or a level making competition. Preferably the latter, because the jjnet duel tournament contest was very successful at providing levels for the bash. However, most of the levels are around what is currently considered duel size, and it'd probably be better to make larger levels for the bash. If you make a contest for ideal bash size levels, I'm not sure if it'd work quite as well.

Also, what does everyone really want to play for the bash? - What in your opinion would be the ideal level to play?

Let's not forget there were some levels made before bash 14 that weren't in put in the packs, and nearly finished levels I think are decent (Finish them?).

Remakes are an option, albeit a lazy one.

So, anything that can motivate people to make levels really.