3BitSaurus
Smash Master
If we're talking likelihood, then personal bias aside, I'd say LoL is the most likely. It's the undisputed main IP of Riot (unlike OW, which has to go up against Warcraft, Starcraft and Diablo), and is also (arguably) the one with the longest legacy between those three. This alone is no confirmation, but we have to remember that the most recent new third party IP in Smash is Bayonetta (2009).I'm curious, do you think it would be a character from:
- LoL
- Fortnight
- Overwatch
other
I guess you could make a stretch and put Persona 5 (2016) up there, since its content in Smash is mostly focused on that specific installment, but even then, those two were the second and third IPs from a company that already had a playable character in the game. So I'm not sure if they would make an exception for Fortnight or OW.