NOTE: I'm not saying you SHOULD do these flash movies, I'm just throwing ideas to the community. Also, if one of my ideas was already used, tell me.
I thought of a few ideas for a new collab:
The Online Gaming Collab: a collab based of playing CoD4 and chatting with n00bs you pwn!
The Special Night Collab: a collab either portraying or parodizing the night you're about to get laid. And that includes furry cuffs and love/erotic songs.
The Irritation Collab: a collab based on things that irritate you and what you would do but shouldn't do in real life to stop it.
The Reverse Thought Collab: a collab that makes cats and dogs friends, i.e a collab that grabs conventional thoughts and flips it around.
I also have ideas for a solo flash. I think them, but I can't create it. (Sucks to be me):
NG v.s The World: A portal opens in Newgrounds that sends all it's flash to the world. The Clock Crew, Pico, The Retarded Animal Babies, Awesome series and all the rest of your favorites start attacking the world, thus causing NG to go against the world (like the title implies)
The Video Game United Pixels: A parody of the UN, all of our video game characters represent thier company and discuss about ideas that they want to be in a new video game. Arguments and comedic ideas would come into the flash.
Madness Thing-Thingimation: The Madness characters get out of Somewhere in Nevada only to find that the Thing-Things are there. Then a fight of Madness characters and Thing-Things come in.
Those are ideasand I doubt that all of them are good. I'm just throwing them out.