Yes, he is in both.
yes http://g4tv.com/videos/41187/Marvel-Ultimate-Alliance-2-Iceman-Vignette/
Yes you can
Yes, Ymir has special dialog with certain characters in Marvel Ultimate Alliance, such as Thor. Ymir is a Frost Giant and a frequent antagonist of Thor in the Marvel Comics, so their interactions in the game reflect this rivalry.
Yes there is marvel ultimate alliance 2
The Ultimate Alliance is a Marvel game with a variety of Marvel superheros
Dan Hay has: Played himself in "Marvel Ultimate Alliance: The Ink to Game Process" in 2006. Played himself in "Marvel Ultimate Alliance: Superheroes of Marvel Ultimate Alliance" in 2006. Played himself in "Marvel Ultimate Alliance: Creating the Alliance" in 2006. Played himself in "Marvel Ultimate Alliance: The Ultimate Game" in 2006. Performed in "Marvel: Ultimate Alliance" in 2006.
no, only in marvel ultimate alliance 1
You cant play online on marvel ultimate alliance.
Is there a release date for marvel ultimate alliance 3
Omari Valentine has: Played himself in "Marvel Ultimate Alliance: The Ink to Game Process" in 2006. Played himself in "Marvel Ultimate Alliance: Superheroes of Marvel Ultimate Alliance" in 2006. Played himself in "Marvel Ultimate Alliance: Creating the Alliance" in 2006. Played himself in "Marvel Ultimate Alliance: The Ultimate Game" in 2006. Played Washington in "Freedom Fighters" in 2013.
Marvel mods
Yeah, most of them. There are some characters in Marvel Ultimate Alliance that aren't in Marvel Ultimate Alliance 2, such as Elektra, Ghost Rider, Dr. Strange and Silver Surfer, and vice versa. You get a bigger group of heroes -- and a few villians -- in MUA2.