Either:

1. In battle
2. En route, Tony on his way to somewhere.

I guess Tony will be thinking about his mortality (Stark seems to always do that) and then - death.

I cannot see Stark and Steve reconciling before his death, that's why it will be so poignant. The woulda, coulda shouldas will eat at Steve like acid.

I hope the art is good though. Dammit.