What maps should be added to Portal eventually?

I've nothing specific (i am terrible at remembering / knowing any map names)

However, I possibly would like one big map as a giant playground, I want to say like warzone size but i am not saying a BR mode...

I thought it could be possibly cool and fun for a lot of people, could have more available vehicles as well, just one big playground, unsure what game mode it could be, just an idea, I suppose they could reuse the firestorm map