Considering the number 3, the 2030s certainly sounds like the right time for a 3rd Fantasia film, even if it releases in 2029 like how Fantasia 2000 released in 1999. Whilst a 3rd Fantasia film like the other two would be expected to have a total of 8 segments, it's worth keeping in mind that they based on how things currently are with Walt Disney Animation Studios would now be 3D Animated, thus making it unlikely for segments from the other two films like The Sorcerer's Apprentice and Pom And Circumstance from being reused. But if Fantasia 2000 already fulfilled with Walt Disney had in mind with the first film then a third film might not be necessary, though if it is still possible then such a film would have to release in 2029 at the earliest and 2039 at the latest.