It is pretty rare for crews to meet on the aircraft unless you are running unexpectedly late, and even then you may only see each other from the other side of a glass door.
I guess I should further qualify that by saying that if the aircraft is routing A-B-C then the crews may meet up at B on a transit turnaround.
It is rare for a 1hour30 rotation on a B747.
Even with 1 hour 30, on schedule the inbound crew will be off by STA+20 and the outbound crew are not scheduled to arrive at the airport until STD-60.
Occasionally at some transit stations, where passengers stay onboard, then one set of cabin crew (which one will depend on hours) will stay onboard or arrive early for a handover. In these instances it is common for the flight deck crew to have separate transport (additional taxi being cheaper than paying pilot overtime).