Interesting
Whilst not quite in the same class, there are parallels to the QF32 incident a few years ago. The aircraft sitting on the runway, leaking fuel, that fuel being atomised by the jet blast from an engine still running, near very hot brakes. A combination that could have caused a fully fueled A380 to combust at any time, however the passengers remained on the aircraft until the the engine was shut down by filling it with foam.
This is albeit a bit different with an uncontained fire engulfing the wing, however it could have happened. That wasn't a Singapore crew, that was an Australian crew. They probably didn't have any situational awareness of the damage that the airframe had sustained with the engine dropping it's internals all over Indonesia either.
As they say, time will tell. A forunate outcome nonetheless.