Everything seems fine to me, although I have a few suggestions mostly unrelated to the prelude.
It started when I'd been thinking about the timing of the opening vlog scene of Homecoming with Civil War, which led me to think about the timing for other things.
-Peter and Happy head from Queens to Berlin via private jet. They are 3960 miles and 6 time zones apart.
The fastest private jet in the world can travel at 711 mph, so the trip would be done in 5.5 hours. Adding the time zones to this means that they'd arrive at Berlin 11.5 hours later.
It's daylight when they leave Queens, and also when they arrive in Germany and have time to sightsee a bit before going to the airport, so I'd say they leave Queens on the afternoon of the 9th and arrive in Germany on the morning of the 10th.
-When heading to the Raft, FRIDAY tells Stark that the psychiatrist had been dispatched from Geneva when Bucky was caught in Romania. In
this deleted scene, he seems to be arriving by train, and a train ride from Geneva to Berlin takes about 10 hours. Even if the deleted scene is discounted as non-canon, for all of this to have happened in the same day means that Steve and Sam would have to have stayed in each location in Europe for less than an hour, and for the news article on the bombing being printed and distributed within a few hours.
So I'd say to put the capture of Bucky in Romania the following day after the funeral and UN scenes. While Stark says "Your old war buddy killed innocent people yesterday" at the airport, the line is vague and might as well be referring to Bucky killing people when escaping the authorities in Romania and/or Germany. It also gives more breathing room for everything to happen in a reasonable amount of time.
-I suggested this already, but I might as well, since I am suggesting other things: I know I was the one who suggested to put the Siberia stuff the day after the airport due to the timezones, but I changed my mind due to the reasoning which was summed up in MCU wiki's discussion:
http://marvelcinematicuniverse.wikia.com/wiki/Thread:217482#253
Zemo called the hotel for his breakfast while in Siberia (8 hours difference), and I'd imagine the Hydra base isn't too far from where he is. When Cap and Bucky arrive later, they say he couldn't have been there more than a few hours. This insinuates that the airport battle probably happened earlier in the day, possibly in the morning (accounting for the time difference), and so they can happen in the same day. Although Stark says Ross gave him 36 hours "24 hours ago", it can be taken as a general term for "yesterday". This also lines up with what I suggested about Peter and Happy leaving Queens in the afternoon and arriving in Germany the following morning.
-Lastly, I think I'd place the Civil War post-credits scene with Peter the night after he is taken back home by Tony, so that his alibi of having been beaten up by some guy from Brooklyn would work out (since his alibi was that he was at the Stark internship retreat for the weekend, so he wouldn't have had time to get beaten up then). Bruises take a couple of days to appear anyway, and there's no sign of any bruises in the scene when he is being taken home. This one's more debatable though; it might also be an error with the makeup department.
I PM'd you the layout for my suggestions in the timeline, so as to not make this post too long.
