Game Mode Idea: Drilldozer Survival

At it's simplest, the idea is a survival mode that takes place on the Drilldozer (from in the Gunkworks). Im imagining endless waves of increasingly difficult enemies either flying around you or riding up to you (and then possibly boarding) in an attempt to take down not only the players but the Drilldozer itself.

This would be a sorta 'defense'/on-rails defense' mode, one that Im thinking would lean more towards survivability/crowd control.
I like the idea of holding down an area (or in this case vehicle) but still giving players (and enemies) room to maneuver and run around, which I think the Drilldozer does pretty well.

I think the idea could be expanded upon (maybe upgrades for the Drilldozer, or areas where some players can jump off of the Drilldozer but risk getting left behind)- at it's core it would be a defense/survival game mode.

P.S: Sorry if chose the wrong flair