I was thinking and wanted to ask you, wouldn't it be great to have some kind of TF2 story mode that combines L4D2 with MVM? I mean, going from point A to B with robots coming from all sides, points where you pass some event and you have to defeat a boss or survive X amount of time to be able to continue, along with the MVM improvements and the movement that makes Team Fortress 2 so fun, I think that, at least as a concept, it sounds fun, I know that there is a kind of campaign called "Machine Attacks" but it doesn't seem very fun to me

I think you can do something really entertaining, but it's just that, an idea.