New Gamemode Idea, 10v1 PvE

So, I think most of us remember the Doom Bots of Doom with the huge Satan Teemo thing. As a fan of MMORPG's where me and my party would team up to take down huge bosses together, the coordination and the dodging of abilities and the adrenaline rush, I think it would be really cool if League of Legends developed a new gamemode for the rotating gamemode where all 10 players on the opposite teams have to work together to defeat one huge boss that can shoot skillshots, CC, etc. Maybe add in some new forms of CC specifically for the boss like "reversed movement" or "temporarily scrambling the QWER and item hotkeys" or something. But yeah, if you get the gist, basically a more powerful Satan Teemo that requires all 10 players to cooperate and bring it down, and it can shoot all sorts of abilities. This gamemode would require teamwork, reaction time, and would just be fun in general I think. To add to the competitiveness, the team that does the most damage to the boss and has the least deaths wins. An optional add in would be to add a time limit of like 20 minutes, and if the boss isn't dead by 20 minutes both teams lose. But, I will emphasize, the boss would have to be big, like bigger then the Doom Bot Satan Teemo, but not so big it goes off screen. The boss being Teemo would be fine as well, but I think making it something like Final Boss Veigar would make more sense since it fits the theme.

Oh yeah, and like Doom Bots, add a difficulty level. With the new quests and stuff, maybe increase quest rewards gained based on difficulty level.