MPMGG: Multi-Platform Multi-Genre Game
It would be great to have multi-genre multi-platform game. A game which touches different kind of genre (moba, fps, rpg, rts, etc.) and accessible on different platform (xbox, pc, mobile, etc.).
Let me give an example: At the moment, we only have a moba within the Runeterra universe. Let's imagine riot develops a rpg set during Shurima's golden age. You could gain different perks depending on your mastery level with each Shurima's champion. Ex: I have Nasus mastery 7. I could gain a boost to X or to Y, it could also reveal specific places (temples, libraries, etc) on my map or give me chances to loot Z item for customization (appearance, dye, etc).
The thing is, doing something in one game would give you perks in the other. Imagine if completing the whole Shurima rpg would unlock all Shurima related champions in the LoL moba? Or if playing a specific role in the "LoL" fps gives you hextech crafting stuff in the moba.
Each genre would be linked by the lore but you would play the game type you prefer without it affecting your experience.
In any universe it would be fun to experience this MPMGG experience; Runeterra, Azeroth, Star Wars, GTA, Zelda, Pokemon, Metal gear, etc.