While Cap and Tony are probably the prime candidates for heroic and honorable deaths, Hawkeye is always near the top of the list.
Seeing Hawkeye beat up like this, it’s worth a reminder that the stakes in Avengers 4 will likely be the highest we’ve ever seen, and victory demands sacrifice.
That said, I expect a personal tragedy is what will see him rejoin the fight in the first place.
Most, if not all of the deaths in Infinity War are in TBD status, as presumably many of those will be reversed, but I think we are all expecting some permanent deaths in Avengers 4.