Don’t look at an empty canvas and imagine what you could fill it with. Instead, have an idea and then figure out how to fit it in the canvas.
Don’t brainstorm some gamemode idea into existence just because there’s an empty slot, we already have plenty of gamemode suggestions in the suggestions category, just post the ideas as threads.
If the choice for this slot happens to be a competition of the ideas from this forum, it should be a fair match and not reduced to candidates from this thread. I could just suggest mine and have an unfair advantage. (Please don’t click the link so I don’t have an unfair advantage. 
)
If it’s not reduced to ideas from this thread, this thread has no point.