UPDATE: An update later in the day on June 29th from the Orlando Sentinel reported that Disney confirmed the closure of The Magic of Disney Animation. The attraction will have it's last day of operation on July 12th with the adjacent Animation Gallery shop expected to remain open until late August.
The original article was as follows:
WDWMagic.com users Legit and marni1971 are reporting that The Magic of Disney Animation and Walt Disney: One Man's Dream are expected to have their last day of operation on July 18th. It is expected that the meet and greets for Mickey and Minnie will be relocated elsewhere in Hollywood Studios, however their are conflicting reports as to whether or not Hiro and Baymax from Big Hero 6 will continue to meet with guests.
Similar to previous attraction closures in Disney's Hollywood Studios, these closures are expected to be related to the rumored overhaul of the park.