Hi,
Bonzo’s weight waxed and waned at earlier points in his life too. In the ‘Song Remains The Same’ film he’s:
* a little overweight in the July 1973 tour footage;
* quite overweight in the Shepparton ‘miming on stage’ footage (August 1974);
* very slim in the ‘fantasy’ footage (late 1974/early 1975?).
In that final(?) photo with Jason I don’t see a man depressed. The tan and slimness suggest that John had been engaged in a lot of outdoor activity, which might explain the weight loss.
Jason