I personally never saw Mimikyu as one of the 'obvious' choices.
For me, the big Pokemon candidates were Decidueye, Lycanroc, and Incineroar. In that order. I still keep my mindset that Decidueye and Lycanroc have the best chances, whereas Incineroar is an underdog that shouldn't be underestimated.
Decidueye is my most wanted out of the three, though I'd be very happy to see Lycanroc if he's done well. Incineroar I'd be a bit disappointed with initially, but can see myself warming up to him depending on how he's implemented in Smash.