Yeah.
I would hope that these movie would be mostly in Nintendo's hands much like how Capcom does the CGI Resi films or how Square did Advent Children and Kingsglaive...
Though i dont think we're lucky enough for that. I doubt Nintendo have the manpower/budget etc to produce movies themselves.
Nintendo mentioned last year that they were going to revisit the movie business within the next 2-3 years.
While Detective Pikachu seems to be the first of these movies there will almost certainly be a Mario film as well, probably CGI like Ratchet and Clank.
But what about a Fire Emblem movie...