kenny, thanks for your comments. i'm pleased that you like the art style i agree with the washed out colours and have already edited the texture of the glass before i posted the screenshot, it is not final as i'm still debating off i should keep that with improvements or have a rendered krusty holding the can.
as for the levels, the plan is to fully connects all of the zones but with improvement to how the map would flow meaning most of the mission structures will pretty much be the same but with some tweaking to the timers while expanding arrears with new buildings and locations in the show. for example the industrial district in level 1 would have things along the springfield river like the little lisa recycling plant.
as for wasps and collectibles. i'm thinking wasps will be in all locations and respawn over time and will not count towards collectible progression.
with collectors cards i would like them to spawn in the same locations depending on what level and character you use similar to the original but with new sets that reference newer episodes and the movie.
there will also be new gags on top of the old ones that will pay homage to newer tv moments and moments from the simpsons movie, no spoilers but one i'm excited about is maggie and her sandbox... if you seen the movie you will understand.