In reality you would put a STAR and runway and expected SID.
Ok, understood.
There would be a route discontinuity, which maybe the reason why as the route will just come to a stop without a runway selected. If you don't want a STAR just use a 10 mile fix on the runway centre line at 3000 210kts.
No, I always use STAR and Approach procedures if available, if they're not, then I use to enter one or more reference point as you said.
My question was only regarding the case I'm flying in cruise waiting to know the arrival STAR from ATC without have entered anything more (for the destination) than the arrival ICAO.