The A380 might be able to do SIN - LHR - SIN with other aircraft routing between the capital cities and Singapore. Possibly extend through to SYD if traffic justifies it. Basing a couple of aircraft there is quite feasible as it's a regular port already with the required maintenance available. SYD - LAX - SYD might be a goer if it takes all the Australia to North America traffic with pax connecting via these cities only
HKG won't be able to fill an A380, Dallas is purely a transfer hub which can be replaced by LAX, and DXB is only to connect with EK flights. Rather codeshare with EK and let them bear the losses.
This would be a realistic scenario for the A380 returning, however it's dependent on Australia opening its borders which may not happen until well into next year, and UK/USA would need to have COVID well under control, however the situation is getting worse rather than better in these countries. Initially the routes could be operated by B787s which could be replaced by the A380 when the volume of traffic is enough to make the larger type profitable.