from what's been shown between trailers and general promotion i feel like i could still go in any direction but honestly the only thing i'm looking forward to is the visuals, since that's just a general strength of illumination, and then hearing the voices of keegan michael key, jack black and charlie day
whether they use pop music imo is no big deal since the sonic movie did so pretty well and i enjoyed it overall and the same with detective pikachu. but with this i think there's a variety of different audiences for this one film who may not all be appeased with whatever the final product is going to be
like i feel that anyone who's played the mario rpg games or anything from the paper mario series may have expectations in terms of story quality, and hell maybe even mario rabids fans(?), and more general/casual i guess fans looking for game references and then (what i feel is the true target audience) kids who obviously have some expectation but mostly are just happy to see their fave video game characters on the big screen
i think that's why it's always funny to me when movies like this come out coz you've got the old nostalgia crowd and then kids and everyone else in between with wildly varying opinions but i think it's just gonna be best to wait and see