MagicBandCollectors.com is reporting that a new FitBit style Magic Band is currently in development at Disney.
The article references a new listing on the FCC's website about the evolution of the device. That post can be found here. The listing on the FCC's website is: FCC ID Q3E-MB-R1G2. The new device appears to allow for the RFID components to be interchangeable with different straps, similar to the Apple Watch.