MH frames are in the market for at least one year without much luck.
SQ may very well drop pending A380 orders for A350s.
I don't think any lessor/airline can afford to sink additional $5+ Million to redo entire interior on top of deferred heavy maintenance of a used A380 and still make money.
Premium heavy SQ/EK cabins are not appropriate for most airlines in secondary market (if there is one for A380)
With just 300 frames, I doubt there will be huge demand for parted out components. Airbus and its supply chain is counting on at least making money on parts. Its not a A320 with 1000s of frames flying around.