Tokyo 7th Sisters was originally launched as a game in Feburary 2014. To take things into perspective, 1. Love Live Sunshine had not yet existed 2. Idolmaster SideM and Million Live were still new 3. Aikatsu was still in its original iteration 4. The original Pripara was launching later that year 5. Wake Up Girls was just been released, 6. The likes of Ensemble Stars and Idolish7 will be coming out in the following year 7. Bang Dream has yet to even be thought of as a concept What possessed the producers to make an aged game into movie in this day and age, when we havehad a new idol anime every season, is beyond me. What would have been decently interesting 6-7 years ago as an anime series has now found itself in a pool of saturation. Because of the market saturation, none of the characters that are on the big screen have shown any form of characteristics, with me just reminded of similar characters I have seen dozens of times from other idol series.
Furthermore, the generic idol songs of the mid 2010s do not shine in today's environment, when many of the other series have much better soundtracks.
The cherry on top is how old school the animation looks. Many idol anime predecessors have shown how amazing concert scenes can be. In the movie, it almost looks like this movie was made in, well, the mid 2010s, when this anime would have been considered decent.
End of the day, this is certainly not a bad movie in any sense of the word, but too little has been done to make it stand out in today's saturated market, and it is saddening such a big name cannot delivery a better movie to its fans.