The Avengers Avengers a culmination of Marvel history (including 616/Ultimate/etc.)

[marvelrobbins]

I think after some thought we should put characters In Avengers like this

616

Captain America(But with costume more like Ultimate but a bit closer here than In SOlo film)
Iron Man
Thor
The Hulk
Loki(although changes were made to his story In films)
Maria Hill

Ultimate

Tony Stark(while In solo film his origin was updated version of 616 origin)
Black Widow(although there are some similarties to 616 version)
Nick Fury
hawkeye(with sacrism of 616 version.Him being controlled by Loki was likely Joss Whedon's nodd to 616 version)

Other

Hulk TV series-Bruce Banner(Mark Ruffalo's Banner was basiclly updated version of Bill Bixby's David Banner with origin In solo film cross between TV
and Ultimate origins)

 

[Vartha]

Well MY guess is that even the Sif/Thor relationship is changing from the first Thor movie.
But yeah there should be some changes from the books and the movies, not to mention a combination from all the different time lines too.

 

[Chance Jackson]

IMO As far as the Avengers movie is concerned

ULTIMATE/S Influences
-Stark(Some elements of his playboy personality)
-Banner(Modern super soldier program origin + the unassuming controlled transformation at the end felt a bit like the end of Ultimates 2 vol 2 )
-Hulk shutting up an otherwise very talkative leader of the Chitauri who has proven himself too much for Cap to handle
SHIELD
-Ubiquity(More in terms of the MCU as a whole rather than just this movie)
-Significance(More so in Avengers than any other MCU movie)
-Nick Fury
-Widow
-Hawkeye
-Nick Fury forming the Avengers as a response to a new age of emerging threats 21st century militaries aren't prepared for, this team solves a major problem caused by other shield personnel
-Built A clear prison cell to restrain the Hulk, used on a legendary citizen of Asgard
-Logo

616 influences
-Maria Hill(afik she has all ready retired from SHIELD when she is introduced in the Ultimate world)
-Thor(all 616 other than Bearded, Helmetless, and capeless in some places)
-Stark(backstory, suits, Pepper)
-Cap(all 616 but some liberties taken)
-Loki being instrumental to the formation of the Avengers
SHIELD
-being under the Umbrella of the UN(not sure if this is true or not)
-having only one major Helicarrier
-Sexual tension between Widow and Barton

 

[JAK®]

Captain America's costume was based on Ultimate Captain America costume.

Not really. The only distinct similarity is the lack of wings on the helmet. Any other similarities are both shared with the 616 version.

 

[Mr. Dent]

Let's also not forget that in the 616 universe Thanos' first appearances involved him coming to Earth seeking the Cosmic Cube. It's crazy how many comic storylines they've set up in these films so subtly.