It will be interesting to see how long it will take to beat and how expansive the worlds are. FFXV took about 20-30 hours to beat the main campaign with a completionist playthrough clocking in close to 100 before the hunt capacity patch and off road Regalia. The GB size before the year of patching was 40.5 GB on PS4 initially. Mind that obviously FFXV was bigger GBs because of texture files, poly counts, and was using a problematic engine. Just for reference KH2 took 20-30 hours for the main campaign and took about 70 hours for completionist.