Alternative game modes !

Hello and hope you having a good day , i just thought by removing Dominion from the game that will leave us with 2 game modes , Summoners Rift and ARAM , so we need more modes for a change . i know that summnoers rift is the core of League of Legends , but there should be alternative game modes even if its in short cycles : (Like URF , One for all , Poro King ... and more events like that ) and i think these modes should be made more often and in short time periods ,because it feels like decades since i played URF or The Legend of Poro king and modes like that.. so my question is , i there any information about upcoming modes ? and if there is one coming , when will that happen?