Can Invasion stay as a new gamemode? (like forever?)

The reason why something like U.R.F and Poroking doesn't stay as an own gamemode is because it's not 'special' enough, they use maps that are already used in other gamemods. But Invasion is it's completely own thing and completely independent. Wouldn't it be great then if Invasion would stay as a new own gamemode? I was also thinking about Ascension to become a new always staying gamemode, but I guess it's not special enough for that.
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