Two topics to discuss:
- Plausibility of Cinco becoming a reality?
- What do you want Cinco to be?
I for one, think that if Cinco happens, it will be a live CD/DVD. I know Cuatro addresses many fans desire to see rarer songs in a live setting, but if the band really opens up their set list options down the road, this will be a very different experience. Who doesn't want to see Dirty Rotten Bastards in all its glory?
As for plausibility, I don't think Green Day wants to think about anything like this for a while, seeing as we have yet to hear any news about music videos for X-Kid or 99 Revolutions. But you never know with these guys...