I honestly think it was a bad presentation
Focusing on 2018 content could have worked if they reminded people all the games coming to the system, and maybe mentioning only (even without a teaser) some of the already announced games coming beyond this year. Maybe they are saving for the other Nintendo Directs of the year.
They had a lot of worth games from third parties that would have been better than 25min of Smash.
The delays also hurt, no matter how patient we are.
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