More Game Mode Passes

I have a suggestion that Riot add more Passes, like the current Snowdown Pass. Maybe they can create ongoing Passes for game modes. A Summon Rift Pass, ARAM Pass; Twisted Treeline Pass; AI Mode Pass. Then create corresponding Missions and have Tokens and prizes for each. Maybe create a Monthly Pass for each Mode. I guess it would be a lot of work creating missions but they seem to have the programming for that.